1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2014 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* Functions for reading the configuration file, and for displaying
9 overall configuration values. Thanks to Brian Candler for the original
10 implementation of the conditional .ifdef etc. */
14 static void fn_smtp_receive_timeout(const uschar * name, const uschar * str);
17 #define CSTATE_STACK_SIZE 10
20 /* Structure for chain (stack) of .included files */
22 typedef struct config_file_item {
23 struct config_file_item *next;
29 /* Structure of table of conditional words and their state transitions */
31 typedef struct cond_item {
39 /* Structure of table of syslog facility names and values */
41 typedef struct syslog_fac_item {
47 /* Static variables */
49 static config_file_item *config_file_stack = NULL; /* For includes */
51 static uschar *syslog_facility_str = NULL;
52 static uschar next_section[24];
53 static uschar time_buffer[24];
55 /* State variables for conditional loading (.ifdef / .else / .endif) */
57 static int cstate = 0;
58 static int cstate_stack_ptr = -1;
59 static int cstate_stack[CSTATE_STACK_SIZE];
61 /* Table of state transitions for handling conditional inclusions. There are
62 four possible state transitions:
66 .elifdef true (or .else)
69 .endif just causes the previous cstate to be popped off the stack */
71 static int next_cstate[3][4] =
73 /* State 0: reading from file, or reading until next .else or .endif */
75 /* State 1: condition failed, skipping until next .else or .endif */
77 /* State 2: skipping until .endif */
81 /* Table of conditionals and the states to set. For each name, there are four
82 values: the length of the name (to save computing it each time), the state to
83 set if a macro was found in the line, the state to set if a macro was not found
84 in the line, and a stack manipulation setting which is:
86 -1 pull state value off the stack
87 0 don't alter the stack
88 +1 push value onto stack, before setting new state
91 static cond_item cond_list[] = {
92 { US"ifdef", 5, 0, 1, 1 },
93 { US"ifndef", 6, 1, 0, 1 },
94 { US"elifdef", 7, 2, 3, 0 },
95 { US"elifndef", 8, 3, 2, 0 },
96 { US"else", 4, 2, 2, 0 },
97 { US"endif", 5, 0, 0, -1 }
100 static int cond_list_size = sizeof(cond_list)/sizeof(cond_item);
102 /* Table of syslog facility names and their values */
104 static syslog_fac_item syslog_list[] = {
105 { US"mail", LOG_MAIL },
106 { US"user", LOG_USER },
107 { US"news", LOG_NEWS },
108 { US"uucp", LOG_UUCP },
109 { US"local0", LOG_LOCAL0 },
110 { US"local1", LOG_LOCAL1 },
111 { US"local2", LOG_LOCAL2 },
112 { US"local3", LOG_LOCAL3 },
113 { US"local4", LOG_LOCAL4 },
114 { US"local5", LOG_LOCAL5 },
115 { US"local6", LOG_LOCAL6 },
116 { US"local7", LOG_LOCAL7 },
117 { US"daemon", LOG_DAEMON }
120 static int syslog_list_size = sizeof(syslog_list)/sizeof(syslog_fac_item);
125 /*************************************************
126 * Main configuration options *
127 *************************************************/
129 /* The list of options that can be set in the main configuration file. This
130 must be in alphabetic order because it is searched by binary chop. */
132 static optionlist optionlist_config[] = {
133 { "*set_exim_group", opt_bool|opt_hidden, &exim_gid_set },
134 { "*set_exim_user", opt_bool|opt_hidden, &exim_uid_set },
135 { "*set_system_filter_group", opt_bool|opt_hidden, &system_filter_gid_set },
136 { "*set_system_filter_user", opt_bool|opt_hidden, &system_filter_uid_set },
137 { "accept_8bitmime", opt_bool, &accept_8bitmime },
138 { "acl_not_smtp", opt_stringptr, &acl_not_smtp },
139 #ifdef WITH_CONTENT_SCAN
140 { "acl_not_smtp_mime", opt_stringptr, &acl_not_smtp_mime },
142 { "acl_not_smtp_start", opt_stringptr, &acl_not_smtp_start },
143 { "acl_smtp_auth", opt_stringptr, &acl_smtp_auth },
144 { "acl_smtp_connect", opt_stringptr, &acl_smtp_connect },
145 { "acl_smtp_data", opt_stringptr, &acl_smtp_data },
147 { "acl_smtp_data_prdr", opt_stringptr, &acl_smtp_data_prdr },
150 { "acl_smtp_dkim", opt_stringptr, &acl_smtp_dkim },
152 { "acl_smtp_etrn", opt_stringptr, &acl_smtp_etrn },
153 { "acl_smtp_expn", opt_stringptr, &acl_smtp_expn },
154 { "acl_smtp_helo", opt_stringptr, &acl_smtp_helo },
155 { "acl_smtp_mail", opt_stringptr, &acl_smtp_mail },
156 { "acl_smtp_mailauth", opt_stringptr, &acl_smtp_mailauth },
157 #ifdef WITH_CONTENT_SCAN
158 { "acl_smtp_mime", opt_stringptr, &acl_smtp_mime },
160 { "acl_smtp_notquit", opt_stringptr, &acl_smtp_notquit },
161 { "acl_smtp_predata", opt_stringptr, &acl_smtp_predata },
162 { "acl_smtp_quit", opt_stringptr, &acl_smtp_quit },
163 { "acl_smtp_rcpt", opt_stringptr, &acl_smtp_rcpt },
165 { "acl_smtp_starttls", opt_stringptr, &acl_smtp_starttls },
167 { "acl_smtp_vrfy", opt_stringptr, &acl_smtp_vrfy },
168 { "admin_groups", opt_gidlist, &admin_groups },
169 { "allow_domain_literals", opt_bool, &allow_domain_literals },
170 { "allow_mx_to_ip", opt_bool, &allow_mx_to_ip },
171 { "allow_utf8_domains", opt_bool, &allow_utf8_domains },
172 { "auth_advertise_hosts", opt_stringptr, &auth_advertise_hosts },
173 { "auto_thaw", opt_time, &auto_thaw },
174 #ifdef WITH_CONTENT_SCAN
175 { "av_scanner", opt_stringptr, &av_scanner },
177 { "bi_command", opt_stringptr, &bi_command },
178 #ifdef EXPERIMENTAL_BRIGHTMAIL
179 { "bmi_config_file", opt_stringptr, &bmi_config_file },
181 { "bounce_message_file", opt_stringptr, &bounce_message_file },
182 { "bounce_message_text", opt_stringptr, &bounce_message_text },
183 { "bounce_return_body", opt_bool, &bounce_return_body },
184 { "bounce_return_message", opt_bool, &bounce_return_message },
185 { "bounce_return_size_limit", opt_mkint, &bounce_return_size_limit },
186 { "bounce_sender_authentication",opt_stringptr,&bounce_sender_authentication },
187 { "callout_domain_negative_expire", opt_time, &callout_cache_domain_negative_expire },
188 { "callout_domain_positive_expire", opt_time, &callout_cache_domain_positive_expire },
189 { "callout_negative_expire", opt_time, &callout_cache_negative_expire },
190 { "callout_positive_expire", opt_time, &callout_cache_positive_expire },
191 { "callout_random_local_part",opt_stringptr, &callout_random_local_part },
192 { "check_log_inodes", opt_int, &check_log_inodes },
193 { "check_log_space", opt_Kint, &check_log_space },
194 { "check_rfc2047_length", opt_bool, &check_rfc2047_length },
195 { "check_spool_inodes", opt_int, &check_spool_inodes },
196 { "check_spool_space", opt_Kint, &check_spool_space },
197 { "daemon_smtp_port", opt_stringptr|opt_hidden, &daemon_smtp_port },
198 { "daemon_smtp_ports", opt_stringptr, &daemon_smtp_port },
199 { "daemon_startup_retries", opt_int, &daemon_startup_retries },
200 { "daemon_startup_sleep", opt_time, &daemon_startup_sleep },
201 #ifdef EXPERIMENTAL_DCC
202 { "dcc_direct_add_header", opt_bool, &dcc_direct_add_header },
203 { "dccifd_address", opt_stringptr, &dccifd_address },
204 { "dccifd_options", opt_stringptr, &dccifd_options },
206 { "delay_warning", opt_timelist, &delay_warning },
207 { "delay_warning_condition", opt_stringptr, &delay_warning_condition },
208 { "deliver_drop_privilege", opt_bool, &deliver_drop_privilege },
209 { "deliver_queue_load_max", opt_fixed, &deliver_queue_load_max },
210 { "delivery_date_remove", opt_bool, &delivery_date_remove },
211 #ifdef ENABLE_DISABLE_FSYNC
212 { "disable_fsync", opt_bool, &disable_fsync },
214 { "disable_ipv6", opt_bool, &disable_ipv6 },
216 { "dkim_verify_signers", opt_stringptr, &dkim_verify_signers },
218 #ifdef EXPERIMENTAL_DMARC
219 { "dmarc_forensic_sender", opt_stringptr, &dmarc_forensic_sender },
220 { "dmarc_history_file", opt_stringptr, &dmarc_history_file },
221 { "dmarc_tld_file", opt_stringptr, &dmarc_tld_file },
223 { "dns_again_means_nonexist", opt_stringptr, &dns_again_means_nonexist },
224 { "dns_check_names_pattern", opt_stringptr, &check_dns_names_pattern },
225 { "dns_csa_search_limit", opt_int, &dns_csa_search_limit },
226 { "dns_csa_use_reverse", opt_bool, &dns_csa_use_reverse },
227 { "dns_dnssec_ok", opt_int, &dns_dnssec_ok },
228 { "dns_ipv4_lookup", opt_stringptr, &dns_ipv4_lookup },
229 { "dns_retrans", opt_time, &dns_retrans },
230 { "dns_retry", opt_int, &dns_retry },
231 { "dns_use_edns0", opt_int, &dns_use_edns0 },
232 /* This option is now a no-op, retained for compability */
233 { "drop_cr", opt_bool, &drop_cr },
234 /*********************************************************/
235 { "dsn_advertise_hosts", opt_stringptr, &dsn_advertise_hosts },
236 { "dsn_from", opt_stringptr, &dsn_from },
237 { "envelope_to_remove", opt_bool, &envelope_to_remove },
238 { "errors_copy", opt_stringptr, &errors_copy },
239 { "errors_reply_to", opt_stringptr, &errors_reply_to },
240 #ifdef EXPERIMENTAL_EVENT
241 { "event_action", opt_stringptr, &event_action },
243 { "exim_group", opt_gid, &exim_gid },
244 { "exim_path", opt_stringptr, &exim_path },
245 { "exim_user", opt_uid, &exim_uid },
246 { "extra_local_interfaces", opt_stringptr, &extra_local_interfaces },
247 { "extract_addresses_remove_arguments", opt_bool, &extract_addresses_remove_arguments },
248 { "finduser_retries", opt_int, &finduser_retries },
249 { "freeze_tell", opt_stringptr, &freeze_tell },
250 { "gecos_name", opt_stringptr, &gecos_name },
251 { "gecos_pattern", opt_stringptr, &gecos_pattern },
253 { "gnutls_allow_auto_pkcs11", opt_bool, &gnutls_allow_auto_pkcs11 },
254 { "gnutls_compat_mode", opt_bool, &gnutls_compat_mode },
255 /* These three gnutls_require_* options stopped working in Exim 4.80 */
256 /* From 4.83 we log a warning; a future relase will remove them */
257 { "gnutls_require_kx", opt_stringptr, &gnutls_require_kx },
258 { "gnutls_require_mac", opt_stringptr, &gnutls_require_mac },
259 { "gnutls_require_protocols", opt_stringptr, &gnutls_require_proto },
261 { "header_line_maxsize", opt_int, &header_line_maxsize },
262 { "header_maxsize", opt_int, &header_maxsize },
263 { "headers_charset", opt_stringptr, &headers_charset },
264 { "helo_accept_junk_hosts", opt_stringptr, &helo_accept_junk_hosts },
265 { "helo_allow_chars", opt_stringptr, &helo_allow_chars },
266 { "helo_lookup_domains", opt_stringptr, &helo_lookup_domains },
267 { "helo_try_verify_hosts", opt_stringptr, &helo_try_verify_hosts },
268 { "helo_verify_hosts", opt_stringptr, &helo_verify_hosts },
269 { "hold_domains", opt_stringptr, &hold_domains },
270 { "host_lookup", opt_stringptr, &host_lookup },
271 { "host_lookup_order", opt_stringptr, &host_lookup_order },
272 { "host_reject_connection", opt_stringptr, &host_reject_connection },
273 { "hosts_connection_nolog", opt_stringptr, &hosts_connection_nolog },
274 { "hosts_treat_as_local", opt_stringptr, &hosts_treat_as_local },
276 { "ibase_servers", opt_stringptr, &ibase_servers },
278 { "ignore_bounce_errors_after", opt_time, &ignore_bounce_errors_after },
279 { "ignore_fromline_hosts", opt_stringptr, &ignore_fromline_hosts },
280 { "ignore_fromline_local", opt_bool, &ignore_fromline_local },
281 { "keep_malformed", opt_time, &keep_malformed },
283 { "ldap_ca_cert_dir", opt_stringptr, &eldap_ca_cert_dir },
284 { "ldap_ca_cert_file", opt_stringptr, &eldap_ca_cert_file },
285 { "ldap_cert_file", opt_stringptr, &eldap_cert_file },
286 { "ldap_cert_key", opt_stringptr, &eldap_cert_key },
287 { "ldap_cipher_suite", opt_stringptr, &eldap_cipher_suite },
288 { "ldap_default_servers", opt_stringptr, &eldap_default_servers },
289 { "ldap_require_cert", opt_stringptr, &eldap_require_cert },
290 { "ldap_start_tls", opt_bool, &eldap_start_tls },
291 { "ldap_version", opt_int, &eldap_version },
293 { "local_from_check", opt_bool, &local_from_check },
294 { "local_from_prefix", opt_stringptr, &local_from_prefix },
295 { "local_from_suffix", opt_stringptr, &local_from_suffix },
296 { "local_interfaces", opt_stringptr, &local_interfaces },
297 { "local_scan_timeout", opt_time, &local_scan_timeout },
298 { "local_sender_retain", opt_bool, &local_sender_retain },
299 { "localhost_number", opt_stringptr, &host_number_string },
300 { "log_file_path", opt_stringptr, &log_file_path },
301 { "log_selector", opt_stringptr, &log_selector_string },
302 { "log_timezone", opt_bool, &log_timezone },
303 { "lookup_open_max", opt_int, &lookup_open_max },
304 { "max_username_length", opt_int, &max_username_length },
305 { "message_body_newlines", opt_bool, &message_body_newlines },
306 { "message_body_visible", opt_mkint, &message_body_visible },
307 { "message_id_header_domain", opt_stringptr, &message_id_domain },
308 { "message_id_header_text", opt_stringptr, &message_id_text },
309 { "message_logs", opt_bool, &message_logs },
310 { "message_size_limit", opt_stringptr, &message_size_limit },
311 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
312 { "move_frozen_messages", opt_bool, &move_frozen_messages },
314 { "mua_wrapper", opt_bool, &mua_wrapper },
316 { "mysql_servers", opt_stringptr, &mysql_servers },
318 { "never_users", opt_uidlist, &never_users },
320 { "openssl_options", opt_stringptr, &openssl_options },
323 { "oracle_servers", opt_stringptr, &oracle_servers },
325 { "percent_hack_domains", opt_stringptr, &percent_hack_domains },
327 { "perl_at_start", opt_bool, &opt_perl_at_start },
328 { "perl_startup", opt_stringptr, &opt_perl_startup },
331 { "pgsql_servers", opt_stringptr, &pgsql_servers },
333 { "pid_file_path", opt_stringptr, &pid_file_path },
334 { "pipelining_advertise_hosts", opt_stringptr, &pipelining_advertise_hosts },
336 { "prdr_enable", opt_bool, &prdr_enable },
338 { "preserve_message_logs", opt_bool, &preserve_message_logs },
339 { "primary_hostname", opt_stringptr, &primary_hostname },
340 { "print_topbitchars", opt_bool, &print_topbitchars },
341 { "process_log_path", opt_stringptr, &process_log_path },
342 { "prod_requires_admin", opt_bool, &prod_requires_admin },
343 #ifdef EXPERIMENTAL_PROXY
344 { "proxy_required_hosts", opt_stringptr, &proxy_required_hosts },
346 { "qualify_domain", opt_stringptr, &qualify_domain_sender },
347 { "qualify_recipient", opt_stringptr, &qualify_domain_recipient },
348 { "queue_domains", opt_stringptr, &queue_domains },
349 { "queue_list_requires_admin",opt_bool, &queue_list_requires_admin },
350 { "queue_only", opt_bool, &queue_only },
351 { "queue_only_file", opt_stringptr, &queue_only_file },
352 { "queue_only_load", opt_fixed, &queue_only_load },
353 { "queue_only_load_latch", opt_bool, &queue_only_load_latch },
354 { "queue_only_override", opt_bool, &queue_only_override },
355 { "queue_run_in_order", opt_bool, &queue_run_in_order },
356 { "queue_run_max", opt_int, &queue_run_max },
357 { "queue_smtp_domains", opt_stringptr, &queue_smtp_domains },
358 { "receive_timeout", opt_time, &receive_timeout },
359 { "received_header_text", opt_stringptr, &received_header_text },
360 { "received_headers_max", opt_int, &received_headers_max },
361 { "recipient_unqualified_hosts", opt_stringptr, &recipient_unqualified_hosts },
362 { "recipients_max", opt_int, &recipients_max },
363 { "recipients_max_reject", opt_bool, &recipients_max_reject },
364 #ifdef EXPERIMENTAL_REDIS
365 { "redis_servers", opt_stringptr, &redis_servers },
367 { "remote_max_parallel", opt_int, &remote_max_parallel },
368 { "remote_sort_domains", opt_stringptr, &remote_sort_domains },
369 { "retry_data_expire", opt_time, &retry_data_expire },
370 { "retry_interval_max", opt_time, &retry_interval_max },
371 { "return_path_remove", opt_bool, &return_path_remove },
372 { "return_size_limit", opt_mkint|opt_hidden, &bounce_return_size_limit },
373 { "rfc1413_hosts", opt_stringptr, &rfc1413_hosts },
374 { "rfc1413_query_timeout", opt_time, &rfc1413_query_timeout },
375 { "sender_unqualified_hosts", opt_stringptr, &sender_unqualified_hosts },
376 { "smtp_accept_keepalive", opt_bool, &smtp_accept_keepalive },
377 { "smtp_accept_max", opt_int, &smtp_accept_max },
378 { "smtp_accept_max_nonmail", opt_int, &smtp_accept_max_nonmail },
379 { "smtp_accept_max_nonmail_hosts", opt_stringptr, &smtp_accept_max_nonmail_hosts },
380 { "smtp_accept_max_per_connection", opt_int, &smtp_accept_max_per_connection },
381 { "smtp_accept_max_per_host", opt_stringptr, &smtp_accept_max_per_host },
382 { "smtp_accept_queue", opt_int, &smtp_accept_queue },
383 { "smtp_accept_queue_per_connection", opt_int, &smtp_accept_queue_per_connection },
384 { "smtp_accept_reserve", opt_int, &smtp_accept_reserve },
385 { "smtp_active_hostname", opt_stringptr, &raw_active_hostname },
386 { "smtp_banner", opt_stringptr, &smtp_banner },
387 { "smtp_check_spool_space", opt_bool, &smtp_check_spool_space },
388 { "smtp_connect_backlog", opt_int, &smtp_connect_backlog },
389 { "smtp_enforce_sync", opt_bool, &smtp_enforce_sync },
390 { "smtp_etrn_command", opt_stringptr, &smtp_etrn_command },
391 { "smtp_etrn_serialize", opt_bool, &smtp_etrn_serialize },
392 { "smtp_load_reserve", opt_fixed, &smtp_load_reserve },
393 { "smtp_max_synprot_errors", opt_int, &smtp_max_synprot_errors },
394 { "smtp_max_unknown_commands",opt_int, &smtp_max_unknown_commands },
395 { "smtp_ratelimit_hosts", opt_stringptr, &smtp_ratelimit_hosts },
396 { "smtp_ratelimit_mail", opt_stringptr, &smtp_ratelimit_mail },
397 { "smtp_ratelimit_rcpt", opt_stringptr, &smtp_ratelimit_rcpt },
398 { "smtp_receive_timeout", opt_func, &fn_smtp_receive_timeout },
399 { "smtp_reserve_hosts", opt_stringptr, &smtp_reserve_hosts },
400 { "smtp_return_error_details",opt_bool, &smtp_return_error_details },
401 #ifdef WITH_CONTENT_SCAN
402 { "spamd_address", opt_stringptr, &spamd_address },
404 #ifdef EXPERIMENTAL_SPF
405 { "spf_guess", opt_stringptr, &spf_guess },
407 { "split_spool_directory", opt_bool, &split_spool_directory },
408 { "spool_directory", opt_stringptr, &spool_directory },
410 { "sqlite_lock_timeout", opt_int, &sqlite_lock_timeout },
412 #ifdef EXPERIMENTAL_SRS
413 { "srs_config", opt_stringptr, &srs_config },
414 { "srs_hashlength", opt_int, &srs_hashlength },
415 { "srs_hashmin", opt_int, &srs_hashmin },
416 { "srs_maxage", opt_int, &srs_maxage },
417 { "srs_secrets", opt_stringptr, &srs_secrets },
418 { "srs_usehash", opt_bool, &srs_usehash },
419 { "srs_usetimestamp", opt_bool, &srs_usetimestamp },
421 { "strict_acl_vars", opt_bool, &strict_acl_vars },
422 { "strip_excess_angle_brackets", opt_bool, &strip_excess_angle_brackets },
423 { "strip_trailing_dot", opt_bool, &strip_trailing_dot },
424 { "syslog_duplication", opt_bool, &syslog_duplication },
425 { "syslog_facility", opt_stringptr, &syslog_facility_str },
426 { "syslog_processname", opt_stringptr, &syslog_processname },
427 { "syslog_timestamp", opt_bool, &syslog_timestamp },
428 { "system_filter", opt_stringptr, &system_filter },
429 { "system_filter_directory_transport", opt_stringptr,&system_filter_directory_transport },
430 { "system_filter_file_transport",opt_stringptr,&system_filter_file_transport },
431 { "system_filter_group", opt_gid, &system_filter_gid },
432 { "system_filter_pipe_transport",opt_stringptr,&system_filter_pipe_transport },
433 { "system_filter_reply_transport",opt_stringptr,&system_filter_reply_transport },
434 { "system_filter_user", opt_uid, &system_filter_uid },
435 { "tcp_nodelay", opt_bool, &tcp_nodelay },
436 #ifdef USE_TCP_WRAPPERS
437 { "tcp_wrappers_daemon_name", opt_stringptr, &tcp_wrappers_daemon_name },
439 { "timeout_frozen_after", opt_time, &timeout_frozen_after },
440 { "timezone", opt_stringptr, &timezone_string },
442 { "tls_advertise_hosts", opt_stringptr, &tls_advertise_hosts },
443 { "tls_certificate", opt_stringptr, &tls_certificate },
444 { "tls_crl", opt_stringptr, &tls_crl },
445 { "tls_dh_max_bits", opt_int, &tls_dh_max_bits },
446 { "tls_dhparam", opt_stringptr, &tls_dhparam },
447 # ifndef DISABLE_OCSP
448 { "tls_ocsp_file", opt_stringptr, &tls_ocsp_file },
450 { "tls_on_connect_ports", opt_stringptr, &tls_in.on_connect_ports },
451 { "tls_privatekey", opt_stringptr, &tls_privatekey },
452 { "tls_remember_esmtp", opt_bool, &tls_remember_esmtp },
453 { "tls_require_ciphers", opt_stringptr, &tls_require_ciphers },
454 { "tls_try_verify_hosts", opt_stringptr, &tls_try_verify_hosts },
455 { "tls_verify_certificates", opt_stringptr, &tls_verify_certificates },
456 { "tls_verify_hosts", opt_stringptr, &tls_verify_hosts },
458 { "trusted_groups", opt_gidlist, &trusted_groups },
459 { "trusted_users", opt_uidlist, &trusted_users },
460 { "unknown_login", opt_stringptr, &unknown_login },
461 { "unknown_username", opt_stringptr, &unknown_username },
462 { "untrusted_set_sender", opt_stringptr, &untrusted_set_sender },
463 { "uucp_from_pattern", opt_stringptr, &uucp_from_pattern },
464 { "uucp_from_sender", opt_stringptr, &uucp_from_sender },
465 { "warn_message_file", opt_stringptr, &warn_message_file },
466 { "write_rejectlog", opt_bool, &write_rejectlog }
469 static int optionlist_config_size =
470 sizeof(optionlist_config)/sizeof(optionlist);
474 /*************************************************
475 * Find the name of an option *
476 *************************************************/
478 /* This function is to aid debugging. Various functions take arguments that are
479 pointer variables in the options table or in option tables for various drivers.
480 For debugging output, it is useful to be able to find the name of the option
481 which is currently being processed. This function finds it, if it exists, by
482 searching the table(s).
484 Arguments: a value that is presumed to be in the table above
485 Returns: the option name, or an empty string
489 readconf_find_option(void *p)
493 transport_instance *t;
495 for (i = 0; i < optionlist_config_size; i++)
496 if (p == optionlist_config[i].value) return US optionlist_config[i].name;
498 for (r = routers; r != NULL; r = r->next)
500 router_info *ri = r->info;
501 for (i = 0; i < *ri->options_count; i++)
503 if ((ri->options[i].type & opt_mask) != opt_stringptr) continue;
504 if (p == (char *)(r->options_block) + (long int)(ri->options[i].value))
505 return US ri->options[i].name;
509 for (t = transports; t != NULL; t = t->next)
511 transport_info *ti = t->info;
512 for (i = 0; i < *ti->options_count; i++)
514 optionlist * op = &ti->options[i];
515 if ((op->type & opt_mask) != opt_stringptr) continue;
516 if (p == ( op->type & opt_public
518 : (char *)t->options_block
520 + (long int)op->value)
531 /*************************************************
532 * Deal with an assignment to a macro *
533 *************************************************/
535 /* This function is called when a line that starts with an upper case letter is
536 encountered. The argument "line" should contain a complete logical line, and
537 start with the first letter of the macro name. The macro name and the
538 replacement text are extracted and stored. Redefinition of existing,
539 non-command line, macros is permitted using '==' instead of '='.
542 s points to the start of the logical line
548 read_macro_assignment(uschar *s)
554 macro_item *mlast = NULL;
556 while (isalnum(*s) || *s == '_')
558 if (namelen >= sizeof(name) - 1)
559 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
560 "macro name too long (maximum is " SIZE_T_FMT " characters)", sizeof(name) - 1);
561 name[namelen++] = *s++;
565 while (isspace(*s)) s++;
567 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "malformed macro definition");
574 while (isspace(*s)) s++;
576 /* If an existing macro of the same name was defined on the command line, we
577 just skip this definition. It's an error to attempt to redefine a macro without
578 redef set to TRUE, or to redefine a macro when it hasn't been defined earlier.
579 It is also an error to define a macro whose name begins with the name of a
580 previously defined macro. Note: it is documented that the other way round
583 for (m = macros; m != NULL; m = m->next)
585 int len = Ustrlen(m->name);
587 if (Ustrcmp(m->name, name) == 0)
589 if (!m->command_line && !redef)
590 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "macro \"%s\" is already "
591 "defined (use \"==\" if you want to redefine it", name);
595 if (len < namelen && Ustrstr(name, m->name) != NULL)
596 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
597 "a macro because previously defined macro \"%s\" is a substring",
600 /* We cannot have this test, because it is documented that a substring
601 macro is permitted (there is even an example).
603 * if (len > namelen && Ustrstr(m->name, name) != NULL)
604 * log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "\"%s\" cannot be defined as "
605 * "a macro because it is a substring of previously defined macro \"%s\"",
612 /* Check for an overriding command-line definition. */
614 if (m != NULL && m->command_line) return;
616 /* Redefinition must refer to an existing macro. */
621 log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "can't redefine an undefined macro "
625 /* We have a new definition. The macro_item structure includes a final vector
626 called "name" which is one byte long. Thus, adding "namelen" gives us enough
627 room to store the "name" string. */
631 m = store_get(sizeof(macro_item) + namelen);
632 if (macros == NULL) macros = m; else mlast->next = m;
633 Ustrncpy(m->name, name, namelen);
634 m->name[namelen] = 0;
636 m->command_line = FALSE;
639 /* Set the value of the new or redefined macro */
641 m->replacement = string_copy(s);
648 /*************************************************
649 * Read configuration line *
650 *************************************************/
652 /* A logical line of text is read from the configuration file into the big
653 buffer, taking account of macros, .includes, and continuations. The size of
654 big_buffer is increased if necessary. The count of configuration lines is
655 maintained. Physical input lines starting with # (ignoring leading white space,
656 and after macro replacement) and empty logical lines are always ignored.
657 Leading and trailing spaces are removed.
659 If we hit a line of the form "begin xxxx", the xxxx is placed in the
660 next_section vector, and the function returns NULL, indicating the end of a
661 configuration section. On end-of-file, NULL is returned with next_section
666 Returns: a pointer to the first non-blank in the line,
667 or NULL if eof or end of section is reached
671 get_config_line(void)
673 int startoffset = 0; /* To first non-blank char in logical line */
674 int len = 0; /* Of logical line so far */
680 /* Loop for handling continuation lines, skipping comments, and dealing with
685 if (Ufgets(big_buffer+len, big_buffer_size-len, config_file) == NULL)
687 if (config_file_stack != NULL) /* EOF inside .include */
689 (void)fclose(config_file);
690 config_file = config_file_stack->file;
691 config_filename = config_file_stack->filename;
692 config_lineno = config_file_stack->lineno;
693 config_file_stack = config_file_stack->next;
697 /* EOF at top level */
699 if (cstate_stack_ptr >= 0)
700 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
701 "Unexpected end of configuration file: .endif missing");
703 if (len != 0) break; /* EOF after continuation */
704 next_section[0] = 0; /* EOF at start of logical line */
709 newlen = len + Ustrlen(big_buffer + len);
711 /* Handle pathologically long physical lines - yes, it did happen - by
712 extending big_buffer at this point. The code also copes with very long
715 while (newlen == big_buffer_size - 1 && big_buffer[newlen - 1] != '\n')
718 big_buffer_size += BIG_BUFFER_SIZE;
719 newbuffer = store_malloc(big_buffer_size);
721 /* This use of strcpy is OK because we know that the string in the old
722 buffer is shorter than the new buffer. */
724 Ustrcpy(newbuffer, big_buffer);
725 store_free(big_buffer);
726 big_buffer = newbuffer;
727 if (Ufgets(big_buffer+newlen, big_buffer_size-newlen, config_file) == NULL)
729 newlen += Ustrlen(big_buffer + newlen);
732 /* Find the true start of the physical line - leading spaces are always
735 ss = big_buffer + len;
736 while (isspace(*ss)) ss++;
738 /* Process the physical line for macros. If this is the start of the logical
739 line, skip over initial text at the start of the line if it starts with an
740 upper case character followed by a sequence of name characters and an equals
741 sign, because that is the definition of a new macro, and we don't do
742 replacement therein. */
745 if (len == 0 && isupper(*s))
747 while (isalnum(*s) || *s == '_') s++;
748 while (isspace(*s)) s++;
749 if (*s != '=') s = ss; /* Not a macro definition */
752 /* For each defined macro, scan the line (from after XXX= if present),
753 replacing all occurrences of the macro. */
756 for (m = macros; m != NULL; m = m->next)
761 while ((p = Ustrstr(t, m->name)) != NULL)
764 int namelen = Ustrlen(m->name);
765 int replen = Ustrlen(m->replacement);
767 /* Expand the buffer if necessary */
769 while (newlen - namelen + replen + 1 > big_buffer_size)
771 int newsize = big_buffer_size + BIG_BUFFER_SIZE;
772 uschar *newbuffer = store_malloc(newsize);
773 memcpy(newbuffer, big_buffer, newlen + 1);
774 p = newbuffer + (p - big_buffer);
775 s = newbuffer + (s - big_buffer);
776 ss = newbuffer + (ss - big_buffer);
777 t = newbuffer + (t - big_buffer);
778 big_buffer_size = newsize;
779 store_free(big_buffer);
780 big_buffer = newbuffer;
783 /* Shuffle the remaining characters up or down in the buffer before
784 copying in the replacement text. Don't rescan the replacement for this
788 moveby = replen - namelen;
791 memmove(p + replen, pp, (big_buffer + newlen) - pp + 1);
794 Ustrncpy(p, m->replacement, replen);
800 /* An empty macro replacement at the start of a line could mean that ss no
801 longer points to the first non-blank character. */
803 while (isspace(*ss)) ss++;
805 /* Check for comment lines - these are physical lines. */
807 if (*ss == '#') continue;
809 /* Handle conditionals, which are also applied to physical lines. Conditions
810 are of the form ".ifdef ANYTEXT" and are treated as true if any macro
811 expansion occured on the rest of the line. A preliminary test for the leading
812 '.' saves effort on most lines. */
818 /* Search the list of conditional directives */
820 for (i = 0; i < cond_list_size; i++)
823 cond_item *c = cond_list+i;
824 if (Ustrncmp(ss+1, c->name, c->namelen) != 0) continue;
826 /* The following character must be white space or end of string */
828 n = ss[1 + c->namelen];
829 if (n != ' ' && n != 't' && n != '\n' && n != 0) break;
831 /* .ifdef and .ifndef push the current state onto the stack, then set
832 a new one from the table. Stack overflow is an error */
836 if (cstate_stack_ptr >= CSTATE_STACK_SIZE - 1)
837 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
838 ".%s nested too deeply", c->name);
839 cstate_stack[++cstate_stack_ptr] = cstate;
840 cstate = next_cstate[cstate][macro_found? c->action1 : c->action2];
843 /* For any of the others, stack underflow is an error. The next state
844 comes either from the stack (.endif) or from the table. */
848 if (cstate_stack_ptr < 0)
849 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
850 ".%s without matching .ifdef", c->name);
851 cstate = (c->pushpop < 0)? cstate_stack[cstate_stack_ptr--] :
852 next_cstate[cstate][macro_found? c->action1 : c->action2];
855 /* Having dealt with a directive, break the loop */
860 /* If we have handled a conditional directive, continue with the next
861 physical line. Otherwise, fall through. */
863 if (i < cond_list_size) continue;
866 /* If the conditional state is not 0 (actively using these lines), ignore
869 if (cstate != 0) continue; /* Conditional skip */
871 /* Handle .include lines - these are also physical lines. */
873 if (Ustrncmp(ss, ".include", 8) == 0 &&
875 (Ustrncmp(ss+8, "_if_exists", 10) == 0 && isspace(ss[18]))))
878 int include_if_exists = isspace(ss[8])? 0 : 10;
879 config_file_item *save;
882 ss += 9 + include_if_exists;
883 while (isspace(*ss)) ss++;
884 t = ss + Ustrlen(ss);
885 while (t > ss && isspace(t[-1])) t--;
886 if (*ss == '\"' && t[-1] == '\"')
894 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, ".include specifies a non-"
895 "absolute path \"%s\"", ss);
897 if (include_if_exists != 0 && (Ustat(ss, &statbuf) != 0)) continue;
899 save = store_get(sizeof(config_file_item));
900 save->next = config_file_stack;
901 config_file_stack = save;
902 save->file = config_file;
903 save->filename = config_filename;
904 save->lineno = config_lineno;
906 config_file = Ufopen(ss, "rb");
907 if (config_file == NULL)
908 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to open included "
909 "configuration file %s", ss);
910 config_filename = string_copy(ss);
915 /* If this is the start of the logical line, remember where the non-blank
916 data starts. Otherwise shuffle down continuation lines to remove leading
920 startoffset = ss - big_buffer;
923 s = big_buffer + len;
926 memmove(s, ss, (newlen - len) - (ss - s) + 1);
931 /* Accept the new addition to the line. Remove trailing white space. */
934 while (len > 0 && isspace(big_buffer[len-1])) len--;
937 /* We are done if the line does not end in backslash and contains some data.
938 Empty logical lines are ignored. For continuations, remove the backslash and
939 go round the loop to read the continuation line. */
943 if (big_buffer[len-1] != '\\') break; /* End of logical line */
944 big_buffer[--len] = 0; /* Remove backslash */
946 } /* Loop for reading multiple physical lines */
948 /* We now have a logical line. Test for the end of a configuration section (or,
949 more accurately, for the start of the next section). Place the name of the next
950 section in next_section, and return NULL. If the name given is longer than
951 next_section, truncate it. It will be unrecognized later, because all the known
952 section names do fit. Leave space for pluralizing. */
954 s = big_buffer + startoffset; /* First non-space character */
955 if (strncmpic(s, US"begin ", 6) == 0)
958 while (isspace(*s)) s++;
959 if (big_buffer + len - s > sizeof(next_section) - 2)
960 s[sizeof(next_section) - 2] = 0;
961 Ustrcpy(next_section, s);
965 /* Return the first non-blank character. */
972 /*************************************************
974 *************************************************/
976 /* The yield is the pointer to the next uschar. Names longer than the
977 output space are silently truncated. This function is also used from acl.c when
981 name where to put the name
985 Returns: new input pointer
989 readconf_readname(uschar *name, int len, uschar *s)
992 while (isspace(*s)) s++;
995 while (isalnum(*s) || *s == '_')
997 if (p < len-1) name[p++] = *s;
1002 while (isspace(*s)) s++;
1009 /*************************************************
1010 * Read a time value *
1011 *************************************************/
1013 /* This function is also called from outside, to read argument
1014 time values. The format of a time value is:
1016 [<n>w][<n>d][<n>h][<n>m][<n>s]
1018 as long as at least one is present. If a format error is encountered,
1019 return a negative value. The value must be terminated by the given
1024 terminator required terminating character
1025 return_msec if TRUE, allow fractional seconds and return milliseconds
1027 Returns: the time value, or -1 on syntax error
1028 value is seconds if return_msec is FALSE
1029 value is milliseconds if return_msec is TRUE
1033 readconf_readtime(const uschar *s, int terminator, BOOL return_msec)
1041 if (!isdigit(*s)) return -1;
1042 (void)sscanf(CCS s, "%d%n", &value, &count);
1047 case 'w': value *= 7;
1048 case 'd': value *= 24;
1049 case 'h': value *= 60;
1050 case 'm': value *= 60;
1055 if (!return_msec) return -1;
1056 (void)sscanf(CCS s, "%lf%n", &fraction, &count);
1058 if (*s++ != 's') return -1;
1059 yield += (int)(fraction * 1000.0);
1065 if (return_msec) value *= 1000;
1067 if (*s == terminator) return yield;
1069 /* Control never reaches here. */
1074 /*************************************************
1075 * Read a fixed point value *
1076 *************************************************/
1078 /* The value is returned *1000
1082 terminator required terminator
1084 Returns: the value, or -1 on error
1088 readconf_readfixed(const uschar *s, int terminator)
1092 if (!isdigit(*s)) return -1;
1093 (void)sscanf(CS s, "%d%n", &value, &count);
1095 yield = value * 1000;
1099 while (isdigit((*(++s))))
1101 yield += (*s - '0') * m;
1106 return (*s == terminator)? yield : (-1);
1111 /*************************************************
1112 * Find option in list *
1113 *************************************************/
1115 /* The lists are always in order, so binary chop can be used.
1118 name the option name to search for
1119 ol the first entry in the option list
1120 last one more than the offset of the last entry in the option list
1122 Returns: pointer to an option entry, or NULL if not found
1126 find_option(uschar *name, optionlist *ol, int last)
1129 while (last > first)
1131 int middle = (first + last)/2;
1132 int c = Ustrcmp(name, ol[middle].name);
1133 if (c == 0) return ol + middle;
1134 else if (c > 0) first = middle + 1;
1142 /*************************************************
1143 * Find a set flag in option list *
1144 *************************************************/
1146 /* Because some versions of Unix make no restrictions on the values of uids and
1147 gids (even negative ones), we cannot represent "unset" by a special value.
1148 There is therefore a separate boolean variable for each one indicating whether
1149 a value is set or not. This function returns a pointer to the boolean, given
1150 the original option name. It is a major disaster if the flag cannot be found.
1153 name the name of the uid or gid option
1154 oltop points to the start of the relevant option list
1155 last one more than the offset of the last item in the option list
1156 data_block NULL when reading main options => data values in the option
1157 list are absolute addresses; otherwise they are byte offsets
1158 in data_block (used for driver options)
1160 Returns: a pointer to the boolean flag.
1164 get_set_flag(uschar *name, optionlist *oltop, int last, void *data_block)
1168 sprintf(CS name2, "*set_%.50s", name);
1169 ol = find_option(name2, oltop, last);
1170 if (ol == NULL) log_write(0, LOG_MAIN|LOG_PANIC_DIE,
1171 "Exim internal error: missing set flag for %s", name);
1172 return (data_block == NULL)? (BOOL *)(ol->value) :
1173 (BOOL *)((uschar *)data_block + (long int)(ol->value));
1179 /*************************************************
1180 * Output extra characters message and die *
1181 *************************************************/
1183 /* Called when an option line has junk on the end. Sometimes this is because
1184 the sysadmin thinks comments are permitted.
1187 s points to the extra characters
1188 t1..t3 strings to insert in the log message
1190 Returns: doesn't return; dies
1194 extra_chars_error(const uschar *s, const uschar *t1, const uschar *t2, const uschar *t3)
1196 uschar *comment = US"";
1197 if (*s == '#') comment = US" (# is comment only at line start)";
1198 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1199 "extra characters follow %s%s%s%s", t1, t2, t3, comment);
1204 /*************************************************
1205 * Read rewrite information *
1206 *************************************************/
1208 /* Each line of rewrite information contains:
1210 . A complete address in the form user@domain, possibly with
1211 leading * for each part; or alternatively, a regex.
1213 . A replacement string (which will be expanded).
1215 . An optional sequence of one-letter flags, indicating which
1216 headers etc. to apply this rule to.
1218 All this is decoded and placed into a control block. The OR of the flags is
1219 maintained in a common word.
1222 p points to the string that makes up the rule
1223 existflags points to the overall flag word
1224 isglobal TRUE if reading global rewrite rules
1226 Returns: the control block for the parsed rule.
1229 static rewrite_rule *
1230 readconf_one_rewrite(const uschar *p, int *existflags, BOOL isglobal)
1232 rewrite_rule *next = store_get(sizeof(rewrite_rule));
1235 next->key = string_dequote(&p);
1237 while (isspace(*p)) p++;
1239 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1240 "missing rewrite replacement string");
1243 next->replacement = string_dequote(&p);
1245 while (*p != 0) switch (*p++)
1247 case ' ': case '\t': break;
1249 case 'q': next->flags |= rewrite_quit; break;
1250 case 'w': next->flags |= rewrite_whole; break;
1252 case 'h': next->flags |= rewrite_all_headers; break;
1253 case 's': next->flags |= rewrite_sender; break;
1254 case 'f': next->flags |= rewrite_from; break;
1255 case 't': next->flags |= rewrite_to; break;
1256 case 'c': next->flags |= rewrite_cc; break;
1257 case 'b': next->flags |= rewrite_bcc; break;
1258 case 'r': next->flags |= rewrite_replyto; break;
1260 case 'E': next->flags |= rewrite_all_envelope; break;
1261 case 'F': next->flags |= rewrite_envfrom; break;
1262 case 'T': next->flags |= rewrite_envto; break;
1264 case 'Q': next->flags |= rewrite_qualify; break;
1265 case 'R': next->flags |= rewrite_repeat; break;
1268 next->flags |= rewrite_smtp;
1269 if (next->key[0] != '^' && Ustrncmp(next->key, "\\N^", 3) != 0)
1270 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1271 "rewrite rule has the S flag but is not a regular expression");
1275 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1276 "unknown rewrite flag character '%c' "
1277 "(could be missing quotes round replacement item)", p[-1]);
1281 /* If no action flags are set, set all the "normal" rewrites. */
1283 if ((next->flags & (rewrite_all | rewrite_smtp)) == 0)
1284 next->flags |= isglobal? rewrite_all : rewrite_all_headers;
1286 /* Remember which exist, for optimization, and return the rule */
1288 *existflags |= next->flags;
1295 /*************************************************
1296 * Read global rewrite information *
1297 *************************************************/
1299 /* Each line is a single rewrite rule; it is parsed into a control block
1300 by readconf_one_rewrite(), and its flags are ORed into the global flag
1301 word rewrite_existflags. */
1304 readconf_rewrites(void)
1306 rewrite_rule **chain = &global_rewrite_rules;
1309 while ((p = get_config_line()) != NULL)
1311 rewrite_rule *next = readconf_one_rewrite(p, &rewrite_existflags, TRUE);
1313 chain = &(next->next);
1319 /*************************************************
1321 *************************************************/
1323 /* Strings are read into the normal store pool. As long we aren't too
1324 near the end of the current block, the string will just use what is necessary
1325 on the top of the stacking pool, because string_cat() uses the extension
1329 s the rest of the input line
1330 name the option name (for errors)
1332 Returns: pointer to the string
1336 read_string(const uschar *s, const uschar *name)
1341 if (*s != '\"') return string_copy(s);
1344 yield = string_dequote(&s);
1346 if (s == ss+1 || s[-1] != '\"')
1347 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1348 "missing quote at end of string value for %s", name);
1350 if (*s != 0) extra_chars_error(s, US"string value for ", name, US"");
1356 /*************************************************
1357 * Custom-handler options *
1358 *************************************************/
1360 fn_smtp_receive_timeout(const uschar * name, const uschar * str)
1363 smtp_receive_timeout_s = string_copy(str);
1366 /* "smtp_receive_timeout", opt_time, &smtp_receive_timeout */
1367 smtp_receive_timeout = readconf_readtime(str, 0, FALSE);
1368 if (smtp_receive_timeout < 0)
1369 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
1374 /*************************************************
1375 * Handle option line *
1376 *************************************************/
1378 /* This function is called from several places to process a line containing the
1379 setting of an option. The first argument is the line to be decoded; it has been
1380 checked not to be empty and not to start with '#'. Trailing newlines and white
1381 space have been removed. The second argument is a pointer to the list of
1382 variable names that are to be recognized, together with their types and
1383 locations, and the third argument gives the number of entries in the list.
1385 The fourth argument is a pointer to a data block. If it is NULL, then the data
1386 values in the options list are absolute addresses. Otherwise, they are byte
1387 offsets in the data block.
1389 String option data may continue onto several lines; this function reads further
1390 data from config_file if necessary.
1392 The yield of this function is normally zero. If a string continues onto
1393 multiple lines, then the data value is permitted to be followed by a comma
1394 or a semicolon (for use in drivers) and the yield is that character.
1397 buffer contains the configuration line to be handled
1398 oltop points to the start of the relevant option list
1399 last one more than the offset of the last item in the option list
1400 data_block NULL when reading main options => data values in the option
1401 list are absolute addresses; otherwise they are byte offsets
1402 in data_block when they have opt_public set; otherwise
1403 they are byte offsets in data_block->options_block.
1404 unknown_txt format string to use in panic message for unknown option;
1405 must contain %s for option name
1406 if given as NULL, don't panic on unknown option
1408 Returns: TRUE if an option was read successfully,
1409 FALSE false for an unknown option if unknown_txt == NULL,
1410 otherwise panic and die on an unknown option
1414 readconf_handle_option(uschar *buffer, optionlist *oltop, int last,
1415 void *data_block, uschar *unknown_txt)
1419 int n, count, type, value;
1423 BOOL boolvalue = TRUE;
1424 BOOL freesptr = TRUE;
1425 optionlist *ol, *ol2;
1429 uschar *inttype = US"";
1432 uschar *saved_condition, *strtemp;
1433 uschar **str_target;
1437 /* There may be leading spaces; thereafter, we expect an option name starting
1440 while (isspace(*s)) s++;
1442 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option setting expected: %s", s);
1444 /* Read the name of the option, and skip any subsequent white space. If
1445 it turns out that what we read was "hide", set the flag indicating that
1446 this is a secure option, and loop to read the next word. */
1448 for (n = 0; n < 2; n++)
1450 while (isalnum(*s) || *s == '_')
1452 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1456 while (isspace(*s)) s++;
1457 if (Ustrcmp(name, "hide") != 0) break;
1458 issecure = opt_secure;
1462 /* Deal with "no_" or "not_" here for booleans */
1464 if (Ustrncmp(name, "no_", 3) == 0)
1470 if (Ustrncmp(name, "not_", 4) == 0)
1476 /* Search the list for the given name. A non-existent name, or an option that
1477 is set twice, is a disaster. */
1479 ol = find_option(name + offset, oltop, last);
1483 if (unknown_txt == NULL) return FALSE;
1484 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, CS unknown_txt, name);
1487 if ((ol->type & opt_set) && !(ol->type & (opt_rep_con | opt_rep_str)))
1488 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1489 "\"%s\" option set for the second time", name);
1491 ol->type |= opt_set | issecure;
1492 type = ol->type & opt_mask;
1494 /* Types with data values must be followed by '='; the "no[t]_" prefix
1495 applies only to boolean values. */
1497 if (type < opt_bool || type > opt_bool_last)
1500 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1501 "negation prefix applied to a non-boolean option");
1503 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1504 "unexpected end of line (data missing) after %s", name);
1506 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing \"=\" after %s", name);
1509 /* If a boolean wasn't preceded by "no[t]_" it can be followed by = and
1510 true/false/yes/no, or, in the case of opt_expand_bool, a general string that
1511 ultimately expands to one of those values. */
1513 else if (*s != 0 && (offset != 0 || *s != '='))
1514 extra_chars_error(s, US"boolean option ", name, US"");
1516 /* Skip white space after = */
1518 if (*s == '=') while (isspace((*(++s))));
1520 /* If there is a data block and the opt_public flag is not set, change
1521 the data block pointer to the private options block. */
1523 if (data_block != NULL && (ol->type & opt_public) == 0)
1524 data_block = (void *)(((driver_instance *)data_block)->options_block);
1526 /* Now get the data according to the type. */
1530 /* If a string value is not enclosed in quotes, it consists of
1531 the rest of the current line, verbatim. Otherwise, string escapes
1534 A transport is specified as a string, which is then looked up in the
1535 list of transports. A search type is specified as one of a number of
1538 A set or rewrite rules for a driver is specified as a string, which is
1539 then parsed into a suitable chain of control blocks.
1541 Uids and gids are specified as strings which are then looked up in the
1542 passwd file. Lists of uids and gids are similarly specified as colon-
1543 separated strings. */
1548 case opt_expand_uid:
1549 case opt_expand_gid:
1554 reset_point = sptr = read_string(s, name);
1556 /* Having read a string, we now have several different ways of using it,
1557 depending on the data type, so do another switch. If keeping the actual
1558 string is not required (because it is interpreted), freesptr is set TRUE,
1559 and at the end we reset the pool. */
1563 /* If this was a string, set the variable to point to the new string,
1564 and set the flag so its store isn't reclaimed. If it was a list of rewrite
1565 rules, we still keep the string (for printing), and parse the rules into a
1566 control block and flags word. */
1569 if (data_block == NULL)
1570 str_target = (uschar **)(ol->value);
1572 str_target = (uschar **)((uschar *)data_block + (long int)(ol->value));
1573 if (ol->type & opt_rep_con)
1575 /* We already have a condition, we're conducting a crude hack to let
1576 multiple condition rules be chained together, despite storing them in
1578 saved_condition = *str_target;
1579 strtemp = string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
1580 saved_condition, sptr);
1581 *str_target = string_copy_malloc(strtemp);
1582 /* TODO(pdp): there is a memory leak here and just below
1583 when we set 3 or more conditions; I still don't
1584 understand the store mechanism enough to know
1585 what's the safe way to free content from an earlier store.
1586 AFAICT, stores stack, so freeing an early stored item also stores
1587 all data alloc'd after it. If we knew conditions were adjacent,
1588 we could survive that, but we don't. So I *think* we need to take
1589 another bit from opt_type to indicate "malloced"; this seems like
1590 quite a hack, especially for this one case. It also means that
1591 we can't ever reclaim the store from the *first* condition.
1593 Because we only do this once, near process start-up, I'm prepared to
1594 let this slide for the time being, even though it rankles. */
1596 else if (ol->type & opt_rep_str)
1598 uschar sep_o = Ustrncmp(name, "headers_add", 11)==0 ? '\n' : ':';
1599 int sep_i = -(int)sep_o;
1600 const uschar * list = sptr;
1602 uschar * list_o = *str_target;
1604 while ((s = string_nextinlist(&list, &sep_i, NULL, 0)))
1605 list_o = string_append_listele(list_o, sep_o, s);
1607 *str_target = string_copy_malloc(list_o);
1617 if (data_block == NULL)
1618 *((uschar **)(ol->value)) = sptr;
1620 *((uschar **)((uschar *)data_block + (long int)(ol->value))) = sptr;
1622 if (type == opt_rewrite)
1627 rewrite_rule **chain;
1630 sprintf(CS name2, "*%.50s_rules", name);
1631 ol2 = find_option(name2, oltop, last);
1632 sprintf(CS name2, "*%.50s_flags", name);
1633 ol3 = find_option(name2, oltop, last);
1635 if (ol2 == NULL || ol3 == NULL)
1636 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1637 "rewrite rules not available for driver");
1639 if (data_block == NULL)
1641 chain = (rewrite_rule **)(ol2->value);
1642 flagptr = (int *)(ol3->value);
1646 chain = (rewrite_rule **)((uschar *)data_block + (long int)(ol2->value));
1647 flagptr = (int *)((uschar *)data_block + (long int)(ol3->value));
1650 while ((p = string_nextinlist(CUSS &sptr, &sep, big_buffer, BIG_BUFFER_SIZE)))
1652 rewrite_rule *next = readconf_one_rewrite(p, flagptr, FALSE);
1654 chain = &(next->next);
1657 if ((*flagptr & (rewrite_all_envelope | rewrite_smtp)) != 0)
1658 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "rewrite rule specifies a "
1659 "non-header rewrite - not allowed at transport time -");
1663 /* If it was an expanded uid, see if there is any expansion to be
1664 done by checking for the presence of a $ character. If there is, save it
1665 in the corresponding *expand_user option field. Otherwise, fall through
1666 to treat it as a fixed uid. Ensure mutual exclusivity of the two kinds
1669 case opt_expand_uid:
1670 sprintf(CS name2, "*expand_%.50s", name);
1671 ol2 = find_option(name2, oltop, last);
1674 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1676 if (data_block == NULL)
1677 *((uschar **)(ol2->value)) = ss;
1679 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1683 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1689 /* Look up a fixed uid, and also make use of the corresponding gid
1690 if a passwd entry is returned and the gid has not been set. */
1693 if (!route_finduser(sptr, &pw, &uid))
1694 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found", sptr);
1695 if (data_block == NULL)
1696 *((uid_t *)(ol->value)) = uid;
1698 *((uid_t *)((uschar *)data_block + (long int)(ol->value))) = uid;
1700 /* Set the flag indicating a fixed value is set */
1702 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1704 /* Handle matching gid if we have a passwd entry: done by finding the
1705 same name with terminating "user" changed to "group"; if not found,
1706 ignore. Also ignore if the value is already set. */
1708 if (pw == NULL) break;
1709 Ustrcpy(name+Ustrlen(name)-4, "group");
1710 ol2 = find_option(name, oltop, last);
1711 if (ol2 != NULL && ((ol2->type & opt_mask) == opt_gid ||
1712 (ol2->type & opt_mask) == opt_expand_gid))
1714 BOOL *set_flag = get_set_flag(name, oltop, last, data_block);
1717 if (data_block == NULL)
1718 *((gid_t *)(ol2->value)) = pw->pw_gid;
1720 *((gid_t *)((uschar *)data_block + (long int)(ol2->value))) = pw->pw_gid;
1726 /* If it was an expanded gid, see if there is any expansion to be
1727 done by checking for the presence of a $ character. If there is, save it
1728 in the corresponding *expand_user option field. Otherwise, fall through
1729 to treat it as a fixed gid. Ensure mutual exclusivity of the two kinds
1732 case opt_expand_gid:
1733 sprintf(CS name2, "*expand_%.50s", name);
1734 ol2 = find_option(name2, oltop, last);
1737 uschar *ss = (Ustrchr(sptr, '$') != NULL)? sptr : NULL;
1739 if (data_block == NULL)
1740 *((uschar **)(ol2->value)) = ss;
1742 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = ss;
1746 *(get_set_flag(name, oltop, last, data_block)) = FALSE;
1752 /* Handle freestanding gid */
1755 if (!route_findgroup(sptr, &gid))
1756 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found", sptr);
1757 if (data_block == NULL)
1758 *((gid_t *)(ol->value)) = gid;
1760 *((gid_t *)((uschar *)data_block + (long int)(ol->value))) = gid;
1761 *(get_set_flag(name, oltop, last, data_block)) = TRUE;
1764 /* If it was a uid list, look up each individual entry, and build
1765 a vector of uids, with a count in the first element. Put the vector
1766 in malloc store so we can free the string. (We are reading into
1767 permanent store already.) */
1775 const uschar *op = expand_string (sptr);
1778 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1779 name, expand_string_message);
1782 if (*p != 0) count++;
1783 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1784 list = store_malloc(count*sizeof(uid_t));
1785 list[ptr++] = (uid_t)(count - 1);
1787 if (data_block == NULL)
1788 *((uid_t **)(ol->value)) = list;
1790 *((uid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1796 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1797 if (!route_finduser(big_buffer, NULL, &uid))
1798 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "user %s was not found",
1805 /* If it was a gid list, look up each individual entry, and build
1806 a vector of gids, with a count in the first element. Put the vector
1807 in malloc store so we can free the string. (We are reading into permanent
1816 const uschar *op = expand_string (sptr);
1819 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "failed to expand %s: %s",
1820 name, expand_string_message);
1823 if (*p != 0) count++;
1824 while (*p != 0) if (*p++ == ':' && *p != 0) count++;
1825 list = store_malloc(count*sizeof(gid_t));
1826 list[ptr++] = (gid_t)(count - 1);
1828 if (data_block == NULL)
1829 *((gid_t **)(ol->value)) = list;
1831 *((gid_t **)((uschar *)data_block + (long int)(ol->value))) = list;
1837 (void)string_nextinlist(&p, &sep, big_buffer, BIG_BUFFER_SIZE);
1838 if (!route_findgroup(big_buffer, &gid))
1839 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "group %s was not found",
1847 /* Release store if the value of the string doesn't need to be kept. */
1849 if (freesptr) store_reset(reset_point);
1852 /* Expanded boolean: if no characters follow, or if there are no dollar
1853 characters, this is a fixed-valued boolean, and we fall through. Otherwise,
1854 save the string for later expansion in the alternate place. */
1856 case opt_expand_bool:
1857 if (*s != 0 && Ustrchr(s, '$') != 0)
1859 sprintf(CS name2, "*expand_%.50s", name);
1860 ol2 = find_option(name2, oltop, last);
1863 reset_point = sptr = read_string(s, name);
1864 if (data_block == NULL)
1865 *((uschar **)(ol2->value)) = sptr;
1867 *((uschar **)((uschar *)data_block + (long int)(ol2->value))) = sptr;
1874 /* Boolean: if no characters follow, the value is boolvalue. Otherwise
1875 look for yes/not/true/false. Some booleans are stored in a single bit in
1876 a single int. There's a special fudge for verify settings; without a suffix
1877 they set both xx_sender and xx_recipient. The table points to the sender
1878 value; search subsequently for the recipient. There's another special case:
1879 opt_bool_set also notes when a boolean has been set. */
1883 case opt_bool_verify:
1887 s = readconf_readname(name2, 64, s);
1888 if (strcmpic(name2, US"true") == 0 || strcmpic(name2, US"yes") == 0)
1890 else if (strcmpic(name2, US"false") == 0 || strcmpic(name2, US"no") == 0)
1892 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1893 "\"%s\" is not a valid value for the \"%s\" option", name2, name);
1894 if (*s != 0) extra_chars_error(s, string_sprintf("\"%s\" ", name2),
1895 US"for boolean option ", name);
1898 /* Handle single-bit type. */
1900 if (type == opt_bit)
1902 int bit = 1 << ((ol->type >> 16) & 31);
1903 int *ptr = (data_block == NULL)?
1904 (int *)(ol->value) :
1905 (int *)((uschar *)data_block + (long int)ol->value);
1906 if (boolvalue) *ptr |= bit; else *ptr &= ~bit;
1910 /* Handle full BOOL types */
1912 if (data_block == NULL)
1913 *((BOOL *)(ol->value)) = boolvalue;
1915 *((BOOL *)((uschar *)data_block + (long int)(ol->value))) = boolvalue;
1919 if (type == opt_bool_verify)
1921 sprintf(CS name2, "%.50s_recipient", name + offset);
1922 ol2 = find_option(name2, oltop, last);
1925 if (data_block == NULL)
1926 *((BOOL *)(ol2->value)) = boolvalue;
1928 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = boolvalue;
1932 /* Note that opt_bool_set type is set, if there is somewhere to do so */
1934 else if (type == opt_bool_set)
1936 sprintf(CS name2, "*set_%.50s", name + offset);
1937 ol2 = find_option(name2, oltop, last);
1940 if (data_block == NULL)
1941 *((BOOL *)(ol2->value)) = TRUE;
1943 *((BOOL *)((uschar *)data_block + (long int)(ol2->value))) = TRUE;
1952 inttype = US"octal ";
1954 /* Integer: a simple(ish) case; allow octal and hex formats, and
1955 suffixes K and M. The different types affect output, not input. */
1964 lvalue = strtol(CS s, CSS &endptr, intbase);
1967 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
1970 if (errno != ERANGE)
1972 if (tolower(*endptr) == 'k')
1974 if (lvalue > INT_MAX/1024 || lvalue < INT_MIN/1024) errno = ERANGE;
1975 else lvalue *= 1024;
1978 else if (tolower(*endptr) == 'm')
1980 if (lvalue > INT_MAX/(1024*1024) || lvalue < INT_MIN/(1024*1024))
1982 else lvalue *= 1024*1024;
1987 if (errno == ERANGE || lvalue > INT_MAX || lvalue < INT_MIN)
1988 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
1989 "absolute value of integer \"%s\" is too large (overflow)", s);
1991 while (isspace(*endptr)) endptr++;
1993 extra_chars_error(endptr, inttype, US"integer value for ", name);
1995 value = (int)lvalue;
1998 if (data_block == NULL)
1999 *((int *)(ol->value)) = value;
2001 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2004 /* Integer held in K: again, allow octal and hex formats, and suffixes K and
2011 value = strtol(CS s, CSS &endptr, intbase);
2014 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%sinteger expected for %s",
2017 if (errno != ERANGE)
2019 if (tolower(*endptr) == 'm')
2021 if (value > INT_MAX/1024 || value < INT_MIN/1024) errno = ERANGE;
2025 else if (tolower(*endptr) == 'k')
2031 value = (value + 512)/1024;
2035 if (errno == ERANGE) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2036 "absolute value of integer \"%s\" is too large (overflow)", s);
2038 while (isspace(*endptr)) endptr++;
2040 extra_chars_error(endptr, inttype, US"integer value for ", name);
2043 if (data_block == NULL)
2044 *((int *)(ol->value)) = value;
2046 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2049 /* Fixed-point number: held to 3 decimal places. */
2052 if (sscanf(CS s, "%d%n", &value, &count) != 1)
2053 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2054 "fixed-point number expected for %s", name);
2056 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2057 "integer \"%s\" is too large (overflow)", s);
2061 if (value < 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2062 "integer \"%s\" is too large (overflow)", s);
2064 if (s[count] == '.')
2067 while (isdigit(s[++count]))
2069 value += (s[count] - '0') * d;
2074 while (isspace(s[count])) count++;
2077 extra_chars_error(s+count, US"fixed-point value for ", name, US"");
2079 if (data_block == NULL)
2080 *((int *)(ol->value)) = value;
2082 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2085 /* There's a special routine to read time values. */
2088 value = readconf_readtime(s, 0, FALSE);
2090 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2092 if (data_block == NULL)
2093 *((int *)(ol->value)) = value;
2095 *((int *)((uschar *)data_block + (long int)(ol->value))) = value;
2098 /* A time list is a list of colon-separated times, with the first
2099 element holding the size of the list and the second the number of
2105 int *list = (data_block == NULL)?
2106 (int *)(ol->value) :
2107 (int *)((uschar *)data_block + (long int)(ol->value));
2109 if (*s != 0) for (count = 1; count <= list[0] - 2; count++)
2112 uschar *snext = Ustrchr(s, ':');
2116 while (ss > s && isspace(ss[-1])) ss--;
2119 value = readconf_readtime(s, terminator, FALSE);
2121 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "invalid time value for %s",
2123 if (count > 1 && value <= list[count])
2124 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2125 "time value out of order for %s", name);
2126 list[count+1] = value;
2127 if (snext == NULL) break;
2129 while (isspace(*s)) s++;
2132 if (count > list[0] - 2)
2133 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many time values for %s",
2135 if (count > 0 && list[2] == 0) count = 0;
2142 void (*fn)() = ol->value;
2153 /*************************************************
2154 * Print a time value *
2155 *************************************************/
2158 Argument: a time value in seconds
2159 Returns: pointer to a fixed buffer containing the time as a string,
2160 in readconf_readtime() format
2164 readconf_printtime(int t)
2167 uschar *p = time_buffer;
2184 if (w > 0) { sprintf(CS p, "%dw", w); while (*p) p++; }
2185 if (d > 0) { sprintf(CS p, "%dd", d); while (*p) p++; }
2186 if (h > 0) { sprintf(CS p, "%dh", h); while (*p) p++; }
2187 if (m > 0) { sprintf(CS p, "%dm", m); while (*p) p++; }
2188 if (s > 0 || p == time_buffer) sprintf(CS p, "%ds", s);
2195 /*************************************************
2196 * Print an individual option value *
2197 *************************************************/
2199 /* This is used by the -bP option, so prints to the standard output.
2200 The entire options list is passed in as an argument, because some options come
2201 in pairs - typically uid/gid settings, which can either be explicit numerical
2202 values, or strings to be expanded later. If the numerical value is unset,
2203 search for "*expand_<name>" to see if there is a string equivalent.
2206 ol option entry, or NULL for an unknown option
2208 options_block NULL for main configuration options; otherwise points to
2209 a driver block; if the option doesn't have opt_public
2210 set, then options_block->options_block is where the item
2212 oltop points to the option list in which ol exists
2213 last one more than the offset of the last entry in optop
2214 no_labels do not show "foo = " at the start.
2220 print_ol(optionlist *ol, uschar *name, void *options_block,
2221 optionlist *oltop, int last, BOOL no_labels)
2234 printf("%s is not a known option\n", name);
2238 /* Non-admin callers cannot see options that have been flagged secure by the
2241 if (!admin_user && (ol->type & opt_secure) != 0)
2243 const char * const hidden = "<value not displayable>";
2245 printf("%s\n", hidden);
2247 printf("%s = %s\n", name, hidden);
2251 /* Else show the value of the option */
2254 if (options_block != NULL)
2256 if ((ol->type & opt_public) == 0)
2257 options_block = (void *)(((driver_instance *)options_block)->options_block);
2258 value = (void *)((uschar *)options_block + (long int)value);
2261 switch(ol->type & opt_mask)
2264 case opt_rewrite: /* Show the text value */
2265 s = *((uschar **)value);
2266 if (!no_labels) printf("%s = ", name);
2267 printf("%s\n", (s == NULL)? US"" : string_printing2(s, FALSE));
2271 if (!no_labels) printf("%s = ", name);
2272 printf("%d\n", *((int *)value));
2277 int x = *((int *)value);
2278 if (x != 0 && (x & 1023) == 0)
2282 if ((x & 1023) == 0)
2287 if (!no_labels) printf("%s = ", name);
2288 printf("%d%c\n", x, c);
2292 if (!no_labels) printf("%s = ", name);
2300 int x = *((int *)value);
2301 if (!no_labels) printf("%s = ", name);
2302 if (x == 0) printf("0\n");
2303 else if ((x & 1023) == 0) printf("%dM\n", x >> 10);
2304 else printf("%dK\n", x);
2309 if (!no_labels) printf("%s = ", name);
2310 printf("%#o\n", *((int *)value));
2313 /* Can be negative only when "unset", in which case integer */
2317 int x = *((int *)value);
2320 if (x < 0) printf("%s =\n", name); else
2322 if (!no_labels) printf("%s = ", name);
2323 printf("%d.", x/1000);
2336 /* If the numerical value is unset, try for the string value */
2338 case opt_expand_uid:
2339 if (! *get_set_flag(name, oltop, last, options_block))
2341 sprintf(CS name2, "*expand_%.50s", name);
2342 ol2 = find_option(name2, oltop, last);
2345 void *value2 = ol2->value;
2346 if (options_block != NULL)
2347 value2 = (void *)((uschar *)options_block + (long int)value2);
2348 s = *((uschar **)value2);
2349 if (!no_labels) printf("%s = ", name);
2350 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2355 /* Else fall through */
2358 if (!no_labels) printf("%s = ", name);
2359 if (! *get_set_flag(name, oltop, last, options_block))
2363 pw = getpwuid(*((uid_t *)value));
2365 printf("%ld\n", (long int)(*((uid_t *)value)));
2366 else printf("%s\n", pw->pw_name);
2370 /* If the numerical value is unset, try for the string value */
2372 case opt_expand_gid:
2373 if (! *get_set_flag(name, oltop, last, options_block))
2375 sprintf(CS name2, "*expand_%.50s", name);
2376 ol2 = find_option(name2, oltop, last);
2377 if (ol2 != NULL && (ol2->type & opt_mask) == opt_stringptr)
2379 void *value2 = ol2->value;
2380 if (options_block != NULL)
2381 value2 = (void *)((uschar *)options_block + (long int)value2);
2382 s = *((uschar **)value2);
2383 if (!no_labels) printf("%s = ", name);
2384 printf("%s\n", (s == NULL)? US"" : string_printing(s));
2389 /* Else fall through */
2392 if (!no_labels) printf("%s = ", name);
2393 if (! *get_set_flag(name, oltop, last, options_block))
2397 gr = getgrgid(*((int *)value));
2399 printf("%ld\n", (long int)(*((int *)value)));
2400 else printf("%s\n", gr->gr_name);
2405 uidlist = *((uid_t **)value);
2406 if (!no_labels) printf("%s =", name);
2407 if (uidlist != NULL)
2411 if (no_labels) sep = '\0';
2412 for (i = 1; i <= (int)(uidlist[0]); i++)
2414 uschar *name = NULL;
2415 pw = getpwuid(uidlist[i]);
2416 if (pw != NULL) name = US pw->pw_name;
2417 if (sep != '\0') printf("%c", sep);
2418 if (name != NULL) printf("%s", name);
2419 else printf("%ld", (long int)(uidlist[i]));
2427 gidlist = *((gid_t **)value);
2428 if (!no_labels) printf("%s =", name);
2429 if (gidlist != NULL)
2433 if (no_labels) sep = '\0';
2434 for (i = 1; i <= (int)(gidlist[0]); i++)
2436 uschar *name = NULL;
2437 gr = getgrgid(gidlist[i]);
2438 if (gr != NULL) name = US gr->gr_name;
2439 if (sep != '\0') printf("%c", sep);
2440 if (name != NULL) printf("%s", name);
2441 else printf("%ld", (long int)(gidlist[i]));
2449 if (!no_labels) printf("%s = ", name);
2450 printf("%s\n", readconf_printtime(*((int *)value)));
2456 int *list = (int *)value;
2457 if (!no_labels) printf("%s = ", name);
2458 for (i = 0; i < list[1]; i++)
2459 printf("%s%s", (i == 0)? "" : ":", readconf_printtime(list[i+2]));
2465 printf("%s%s\n", ((*((int *)value)) & (1 << ((ol->type >> 16) & 31)))?
2469 case opt_expand_bool:
2470 sprintf(CS name2, "*expand_%.50s", name);
2471 ol2 = find_option(name2, oltop, last);
2472 if (ol2 != NULL && ol2->value != NULL)
2474 void *value2 = ol2->value;
2475 if (options_block != NULL)
2476 value2 = (void *)((uschar *)options_block + (long int)value2);
2477 s = *((uschar **)value2);
2480 if (!no_labels) printf("%s = ", name);
2481 printf("%s\n", string_printing(s));
2484 /* s == NULL => string not set; fall through */
2490 case opt_bool_verify:
2492 printf("%s%s\n", (*((BOOL *)value))? "" : "no_", name);
2499 /*************************************************
2500 * Print value from main configuration *
2501 *************************************************/
2503 /* This function, called as a result of encountering the -bP option,
2504 causes the value of any main configuration variable to be output if the
2505 second argument is NULL. There are some special values:
2507 all print all main configuration options
2508 configure_file print the name of the configuration file
2509 routers print the routers' configurations
2510 transports print the transports' configuration
2511 authenticators print the authenticators' configuration
2512 macros print the macros' configuration
2513 router_list print a list of router names
2514 transport_list print a list of transport names
2515 authenticator_list print a list of authentication mechanism names
2516 macro_list print a list of macro names
2517 +name print a named list item
2518 local_scan print the local_scan options
2520 If the second argument is not NULL, it must be one of "router", "transport",
2521 "authenticator" or "macro" in which case the first argument identifies the
2522 driver whose options are to be printed.
2525 name option name if type == NULL; else driver name
2526 type NULL or driver type name, as described above
2527 no_labels avoid the "foo = " at the start of an item
2533 readconf_print(uschar *name, uschar *type, BOOL no_labels)
2535 BOOL names_only = FALSE;
2537 optionlist *ol2 = NULL;
2538 driver_instance *d = NULL;
2549 static uschar *types[] = { US"address", US"domain", US"host",
2551 static tree_node **anchors[] = { &addresslist_anchor, &domainlist_anchor,
2552 &hostlist_anchor, &localpartlist_anchor };
2554 for (i = 0; i < 4; i++)
2556 t = tree_search(*(anchors[i]), name+1);
2561 printf("%s\n", ((namedlist_block *)(t->data.ptr))->string);
2563 printf("%slist %s = %s\n", types[i], name+1,
2564 ((namedlist_block *)(t->data.ptr))->string);
2569 printf("no address, domain, host, or local part list called \"%s\" "
2570 "exists\n", name+1);
2575 if (Ustrcmp(name, "configure_file") == 0)
2577 printf("%s\n", CS config_main_filename);
2581 if (Ustrcmp(name, "all") == 0)
2583 for (ol = optionlist_config;
2584 ol < optionlist_config + optionlist_config_size; ol++)
2586 if ((ol->type & opt_hidden) == 0)
2587 print_ol(ol, US ol->name, NULL,
2588 optionlist_config, optionlist_config_size,
2594 if (Ustrcmp(name, "local_scan") == 0)
2596 #ifndef LOCAL_SCAN_HAS_OPTIONS
2597 printf("local_scan() options are not supported\n");
2599 for (ol = local_scan_options;
2600 ol < local_scan_options + local_scan_options_count; ol++)
2602 print_ol(ol, US ol->name, NULL, local_scan_options,
2603 local_scan_options_count, no_labels);
2609 if (Ustrcmp(name, "routers") == 0)
2614 else if (Ustrcmp(name, "transports") == 0)
2616 type = US"transport";
2620 else if (Ustrcmp(name, "authenticators") == 0)
2622 type = US"authenticator";
2626 else if (Ustrcmp(name, "macros") == 0)
2632 else if (Ustrcmp(name, "router_list") == 0)
2639 else if (Ustrcmp(name, "transport_list") == 0)
2641 type = US"transport";
2646 else if (Ustrcmp(name, "authenticator_list") == 0)
2648 type = US"authenticator";
2653 else if (Ustrcmp(name, "macro_list") == 0)
2662 print_ol(find_option(name, optionlist_config, optionlist_config_size),
2663 name, NULL, optionlist_config, optionlist_config_size, no_labels);
2668 /* Handle the options for a router or transport. Skip options that are flagged
2669 as hidden. Some of these are options with names starting with '*', used for
2670 internal alternative representations of other options (which the printing
2671 function will sort out). Others are synonyms kept for backward compatibility.
2674 if (Ustrcmp(type, "router") == 0)
2676 d = (driver_instance *)routers;
2677 ol2 = optionlist_routers;
2678 size = optionlist_routers_size;
2680 else if (Ustrcmp(type, "transport") == 0)
2682 d = (driver_instance *)transports;
2683 ol2 = optionlist_transports;
2684 size = optionlist_transports_size;
2686 else if (Ustrcmp(type, "authenticator") == 0)
2688 d = (driver_instance *)auths;
2689 ol2 = optionlist_auths;
2690 size = optionlist_auths_size;
2693 else if (Ustrcmp(type, "macro") == 0)
2695 /* People store passwords in macros and they were previously not available
2696 for printing. So we have an admin_users restriction. */
2699 fprintf(stderr, "exim: permission denied\n");
2702 for (m = macros; m != NULL; m = m->next)
2704 if (name == NULL || Ustrcmp(name, m->name) == 0)
2707 printf("%s\n", CS m->name);
2709 printf("%s=%s\n", CS m->name, CS m->replacement);
2715 printf("%s %s not found\n", type, name);
2721 for (; d != NULL; d = d->next) printf("%s\n", CS d->name);
2725 /* Either search for a given driver, or print all of them */
2727 for (; d != NULL; d = d->next)
2730 printf("\n%s %s:\n", d->name, type);
2731 else if (Ustrcmp(d->name, name) != 0) continue;
2733 for (ol = ol2; ol < ol2 + size; ol++)
2735 if ((ol->type & opt_hidden) == 0)
2736 print_ol(ol, US ol->name, d, ol2, size, no_labels);
2739 for (ol = d->info->options;
2740 ol < d->info->options + *(d->info->options_count); ol++)
2742 if ((ol->type & opt_hidden) == 0)
2743 print_ol(ol, US ol->name, d, d->info->options, *(d->info->options_count), no_labels);
2745 if (name != NULL) return;
2747 if (name != NULL) printf("%s %s not found\n", type, name);
2752 /*************************************************
2753 * Read a named list item *
2754 *************************************************/
2756 /* This function reads a name and a list (i.e. string). The name is used to
2757 save the list in a tree, sorted by its name. Each entry also has a number,
2758 which can be used for caching tests, but if the string contains any expansion
2759 items other than $key, the number is set negative to inhibit caching. This
2760 mechanism is used for domain, host, and address lists that are referenced by
2764 anchorp points to the tree anchor
2765 numberp points to the current number for this tree
2766 max the maximum number permitted
2767 s the text of the option line, starting immediately after the name
2769 tname the name of the list type, for messages
2775 read_named_list(tree_node **anchorp, int *numberp, int max, uschar *s,
2778 BOOL forcecache = FALSE;
2781 namedlist_block *nb = store_get(sizeof(namedlist_block));
2783 if (Ustrncmp(s, "_cache", 6) == 0)
2790 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unrecognized configuration line");
2792 if (*numberp >= max)
2793 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "too many named %ss (max is %d)\n",
2796 while (isspace(*s)) s++;
2798 while (isalnum(*s) || *s == '_') s++;
2799 t = store_get(sizeof(tree_node) + s-ss);
2800 Ustrncpy(t->name, ss, s-ss);
2802 while (isspace(*s)) s++;
2804 if (!tree_insertnode(anchorp, t))
2805 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2806 "duplicate name \"%s\" for a named %s", t->name, tname);
2809 nb->number = *numberp;
2812 if (*s++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
2813 "missing '=' after \"%s\"", t->name);
2814 while (isspace(*s)) s++;
2815 nb->string = read_string(s, t->name);
2816 nb->cache_data = NULL;
2818 /* Check the string for any expansions; if any are found, mark this list
2819 uncacheable unless the user has explicited forced caching. */
2821 if (!forcecache && Ustrchr(nb->string, '$') != NULL) nb->number = -1;
2827 /*************************************************
2828 * Unpick data for a rate limit *
2829 *************************************************/
2831 /* This function is called to unpick smtp_ratelimit_{mail,rcpt} into four
2835 s string, in the form t,b,f,l
2836 where t is the threshold (integer)
2837 b is the initial delay (time)
2838 f is the multiplicative factor (fixed point)
2839 k is the maximum time (time)
2840 threshold where to store threshold
2841 base where to store base in milliseconds
2842 factor where to store factor in milliseconds
2843 limit where to store limit
2845 Returns: nothing (panics on error)
2849 unpick_ratelimit(uschar *s, int *threshold, int *base, double *factor,
2852 uschar bstring[16], lstring[16];
2854 if (sscanf(CS s, "%d, %15[0123456789smhdw.], %lf, %15s", threshold, bstring,
2855 factor, lstring) == 4)
2857 *base = readconf_readtime(bstring, 0, TRUE);
2858 *limit = readconf_readtime(lstring, 0, TRUE);
2859 if (*base >= 0 && *limit >= 0) return;
2861 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "malformed ratelimit data: %s", s);
2867 /*************************************************
2868 * Drop privs for checking TLS config *
2869 *************************************************/
2871 /* We want to validate TLS options during readconf, but do not want to be
2872 root when we call into the TLS library, in case of library linkage errors
2873 which cause segfaults; before this check, those were always done as the Exim
2874 runtime user and it makes sense to continue with that.
2876 Assumes: tls_require_ciphers has been set, if it will be
2877 exim_user has been set, if it will be
2878 exim_group has been set, if it will be
2880 Returns: bool for "okay"; false will cause caller to immediately exit.
2885 tls_dropprivs_validate_require_cipher(void)
2887 const uschar *errmsg;
2890 void (*oldsignal)(int);
2892 oldsignal = signal(SIGCHLD, SIG_DFL);
2895 if ((pid = fork()) < 0)
2896 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "fork failed for TLS check");
2900 /* in some modes, will have dropped privilege already */
2902 exim_setugid(exim_uid, exim_gid, FALSE,
2903 US"calling tls_validate_require_cipher");
2905 errmsg = tls_validate_require_cipher();
2908 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
2909 "tls_require_ciphers invalid: %s", errmsg);
2916 rc = waitpid(pid, &status, 0);
2917 } while (rc < 0 && errno == EINTR);
2920 debug_printf("tls_validate_require_cipher child %d ended: status=0x%x\n",
2923 signal(SIGCHLD, oldsignal);
2927 #endif /* SUPPORT_TLS */
2932 /*************************************************
2933 * Read main configuration options *
2934 *************************************************/
2936 /* This function is the first to be called for configuration reading. It
2937 opens the configuration file and reads general configuration settings until
2938 it reaches the end of the configuration section. The file is then left open so
2939 that the remaining configuration data can subsequently be read if needed for
2942 The configuration file must be owned either by root or exim, and be writeable
2943 only by root or uid/gid exim. The values for Exim's uid and gid can be changed
2944 in the config file, so the test is done on the compiled in values. A slight
2945 anomaly, to be carefully documented.
2947 The name of the configuration file is taken from a list that is included in the
2948 binary of Exim. It can be altered from the command line, but if that is done,
2949 root privilege is immediately withdrawn unless the caller is root or exim.
2950 The first file on the list that exists is used.
2952 For use on multiple systems that share file systems, first look for a
2953 configuration file whose name has the current node name on the end. If that is
2954 not found, try the generic name. For really contorted configurations, that run
2955 multiple Exims with different uid settings, first try adding the effective uid
2956 before the node name. These complications are going to waste resources on most
2957 systems. Therefore they are available only when requested by compile-time
2964 struct stat statbuf;
2965 uschar *s, *filename;
2966 const uschar *list = config_main_filelist;
2968 /* Loop through the possible file names */
2970 while((filename = string_nextinlist(&list, &sep, big_buffer, big_buffer_size))
2973 /* Cut out all the fancy processing unless specifically wanted */
2975 #if defined(CONFIGURE_FILE_USE_NODE) || defined(CONFIGURE_FILE_USE_EUID)
2976 uschar *suffix = filename + Ustrlen(filename);
2978 /* Try for the node-specific file if a node name exists */
2980 #ifdef CONFIGURE_FILE_USE_NODE
2982 if (uname(&uts) >= 0)
2984 #ifdef CONFIGURE_FILE_USE_EUID
2985 sprintf(CS suffix, ".%ld.%.256s", (long int)original_euid, uts.nodename);
2986 config_file = Ufopen(filename, "rb");
2987 if (config_file == NULL)
2988 #endif /* CONFIGURE_FILE_USE_EUID */
2990 sprintf(CS suffix, ".%.256s", uts.nodename);
2991 config_file = Ufopen(filename, "rb");
2994 #endif /* CONFIGURE_FILE_USE_NODE */
2996 /* Otherwise, try the generic name, possibly with the euid added */
2998 #ifdef CONFIGURE_FILE_USE_EUID
2999 if (config_file == NULL)
3001 sprintf(CS suffix, ".%ld", (long int)original_euid);
3002 config_file = Ufopen(filename, "rb");
3004 #endif /* CONFIGURE_FILE_USE_EUID */
3006 /* Finally, try the unadorned name */
3008 if (config_file == NULL)
3011 config_file = Ufopen(filename, "rb");
3013 #else /* if neither defined */
3015 /* This is the common case when the fancy processing is not included. */
3017 config_file = Ufopen(filename, "rb");
3020 /* If the file does not exist, continue to try any others. For any other
3021 error, break out (and die). */
3023 if (config_file != NULL || errno != ENOENT) break;
3026 /* On success, save the name for verification; config_filename is used when
3027 logging configuration errors (it changes for .included files) whereas
3028 config_main_filename is the name shown by -bP. Failure to open a configuration
3029 file is a serious disaster. */
3031 if (config_file != NULL)
3034 config_filename = config_main_filename = string_copy(filename);
3036 p = Ustrrchr(filename, '/');
3037 config_main_directory = p ? string_copyn(filename, p - filename)
3038 : string_copy(US".");
3042 if (filename == NULL)
3043 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "non-existent configuration file(s): "
3044 "%s", config_main_filelist);
3046 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", string_open_failed(errno,
3047 "configuration file %s", filename));
3050 /* Check the status of the file we have opened, if we have retained root
3051 privileges and the file isn't /dev/null (which *should* be 0666). */
3053 if (trusted_config && Ustrcmp(filename, US"/dev/null"))
3055 if (fstat(fileno(config_file), &statbuf) != 0)
3056 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to stat configuration file %s",
3059 if ((statbuf.st_uid != root_uid /* owner not root */
3060 #ifdef CONFIGURE_OWNER
3061 && statbuf.st_uid != config_uid /* owner not the special one */
3064 (statbuf.st_gid != root_gid /* group not root & */
3065 #ifdef CONFIGURE_GROUP
3066 && statbuf.st_gid != config_gid /* group not the special one */
3068 && (statbuf.st_mode & 020) != 0) || /* group writeable */
3070 ((statbuf.st_mode & 2) != 0)) /* world writeable */
3072 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Exim configuration file %s has the "
3073 "wrong owner, group, or mode", big_buffer);
3076 /* Process the main configuration settings. They all begin with a lower case
3077 letter. If we see something starting with an upper case letter, it is taken as
3078 a macro definition. */
3080 while ((s = get_config_line()) != NULL)
3082 if (isupper(s[0])) read_macro_assignment(s);
3084 else if (Ustrncmp(s, "domainlist", 10) == 0)
3085 read_named_list(&domainlist_anchor, &domainlist_count,
3086 MAX_NAMED_LIST, s+10, US"domain list");
3088 else if (Ustrncmp(s, "hostlist", 8) == 0)
3089 read_named_list(&hostlist_anchor, &hostlist_count,
3090 MAX_NAMED_LIST, s+8, US"host list");
3092 else if (Ustrncmp(s, US"addresslist", 11) == 0)
3093 read_named_list(&addresslist_anchor, &addresslist_count,
3094 MAX_NAMED_LIST, s+11, US"address list");
3096 else if (Ustrncmp(s, US"localpartlist", 13) == 0)
3097 read_named_list(&localpartlist_anchor, &localpartlist_count,
3098 MAX_NAMED_LIST, s+13, US"local part list");
3101 (void) readconf_handle_option(s, optionlist_config, optionlist_config_size,
3102 NULL, US"main option \"%s\" unknown");
3106 /* If local_sender_retain is set, local_from_check must be unset. */
3108 if (local_sender_retain && local_from_check)
3109 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "both local_from_check and "
3110 "local_sender_retain are set; this combination is not allowed");
3112 /* If the timezone string is empty, set it to NULL, implying no TZ variable
3115 if (timezone_string != NULL && *timezone_string == 0) timezone_string = NULL;
3117 /* The max retry interval must not be greater than 24 hours. */
3119 if (retry_interval_max > 24*60*60) retry_interval_max = 24*60*60;
3121 /* remote_max_parallel must be > 0 */
3123 if (remote_max_parallel <= 0) remote_max_parallel = 1;
3125 /* Save the configured setting of freeze_tell, so we can re-instate it at the
3126 start of a new SMTP message. */
3128 freeze_tell_config = freeze_tell;
3130 /* The primary host name may be required for expansion of spool_directory
3131 and log_file_path, so make sure it is set asap. It is obtained from uname(),
3132 but if that yields an unqualified value, make a FQDN by using gethostbyname to
3133 canonize it. Some people like upper case letters in their host names, so we
3134 don't force the case. */
3136 if (primary_hostname == NULL)
3138 const uschar *hostname;
3140 if (uname(&uts) < 0)
3141 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "uname() failed to yield host name");
3142 hostname = US uts.nodename;
3144 if (Ustrchr(hostname, '.') == NULL)
3147 struct hostent *hostdata;
3150 if (!disable_ipv6 && (dns_ipv4_lookup == NULL ||
3151 match_isinlist(hostname, CUSS &dns_ipv4_lookup, 0, NULL, NULL,
3152 MCL_DOMAIN, TRUE, NULL) != OK))
3161 #if HAVE_GETIPNODEBYNAME
3163 hostdata = getipnodebyname(CS hostname, af, 0, &error_num);
3165 hostdata = gethostbyname2(CS hostname, af);
3168 hostdata = gethostbyname(CS hostname);
3171 if (hostdata != NULL)
3173 hostname = US hostdata->h_name;
3177 if (af == AF_INET) break;
3182 primary_hostname = string_copy(hostname);
3185 /* Set up default value for smtp_active_hostname */
3187 smtp_active_hostname = primary_hostname;
3189 /* If spool_directory wasn't set in the build-time configuration, it must have
3190 got set above. Of course, writing to the log may not work if log_file_path is
3191 not set, but it will at least get to syslog or somewhere, with any luck. */
3193 if (*spool_directory == 0)
3194 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "spool_directory undefined: cannot "
3197 /* Expand the spool directory name; it may, for example, contain the primary
3198 host name. Same comment about failure. */
3200 s = expand_string(spool_directory);
3202 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand spool_directory "
3203 "\"%s\": %s", spool_directory, expand_string_message);
3204 spool_directory = s;
3206 /* Expand log_file_path, which must contain "%s" in any component that isn't
3207 the null string or "syslog". It is also allowed to contain one instance of %D
3208 or %M. However, it must NOT contain % followed by anything else. */
3210 if (*log_file_path != 0)
3212 const uschar *ss, *sss;
3213 int sep = ':'; /* Fixed for log file path */
3214 s = expand_string(log_file_path);
3216 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand log_file_path "
3217 "\"%s\": %s", log_file_path, expand_string_message);
3220 while ((sss = string_nextinlist(&ss,&sep,big_buffer,big_buffer_size)) != NULL)
3223 if (sss[0] == 0 || Ustrcmp(sss, "syslog") == 0) continue;
3224 t = Ustrstr(sss, "%s");
3226 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" does not "
3227 "contain \"%%s\"", sss);
3229 t = Ustrchr(sss, '%');
3232 if ((t[1] != 'D' && t[1] != 'M') || Ustrchr(t+2, '%') != NULL)
3233 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "log_file_path \"%s\" contains "
3234 "unexpected \"%%\" character", s);
3241 /* Interpret syslog_facility into an integer argument for 'ident' param to
3242 openlog(). Default is LOG_MAIL set in globals.c. Allow the user to omit the
3245 if (syslog_facility_str != NULL)
3248 uschar *s = syslog_facility_str;
3250 if ((Ustrlen(syslog_facility_str) >= 4) &&
3251 (strncmpic(syslog_facility_str, US"log_", 4) == 0))
3254 for (i = 0; i < syslog_list_size; i++)
3256 if (strcmpic(s, syslog_list[i].name) == 0)
3258 syslog_facility = syslog_list[i].value;
3263 if (i >= syslog_list_size)
3265 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3266 "failed to interpret syslog_facility \"%s\"", syslog_facility_str);
3270 /* Expand pid_file_path */
3272 if (*pid_file_path != 0)
3274 s = expand_string(pid_file_path);
3276 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand pid_file_path "
3277 "\"%s\": %s", pid_file_path, expand_string_message);
3281 /* Set default value of process_log_path */
3283 if (process_log_path == NULL || *process_log_path =='\0')
3284 process_log_path = string_sprintf("%s/exim-process.info", spool_directory);
3286 /* Compile the regex for matching a UUCP-style "From_" line in an incoming
3289 regex_From = regex_must_compile(uucp_from_pattern, FALSE, TRUE);
3291 /* Unpick the SMTP rate limiting options, if set */
3293 if (smtp_ratelimit_mail != NULL)
3295 unpick_ratelimit(smtp_ratelimit_mail, &smtp_rlm_threshold,
3296 &smtp_rlm_base, &smtp_rlm_factor, &smtp_rlm_limit);
3299 if (smtp_ratelimit_rcpt != NULL)
3301 unpick_ratelimit(smtp_ratelimit_rcpt, &smtp_rlr_threshold,
3302 &smtp_rlr_base, &smtp_rlr_factor, &smtp_rlr_limit);
3305 /* The qualify domains default to the primary host name */
3307 if (qualify_domain_sender == NULL)
3308 qualify_domain_sender = primary_hostname;
3309 if (qualify_domain_recipient == NULL)
3310 qualify_domain_recipient = qualify_domain_sender;
3312 /* Setting system_filter_user in the configuration sets the gid as well if a
3313 name is given, but a numerical value does not. */
3315 if (system_filter_uid_set && !system_filter_gid_set)
3317 struct passwd *pw = getpwuid(system_filter_uid);
3319 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to look up uid %ld",
3320 (long int)system_filter_uid);
3321 system_filter_gid = pw->pw_gid;
3322 system_filter_gid_set = TRUE;
3325 /* If the errors_reply_to field is set, check that it is syntactically valid
3326 and ensure it contains a domain. */
3328 if (errors_reply_to != NULL)
3331 int start, end, domain;
3332 uschar *recipient = parse_extract_address(errors_reply_to, &errmess,
3333 &start, &end, &domain, FALSE);
3335 if (recipient == NULL)
3336 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3337 "error in errors_reply_to (%s): %s", errors_reply_to, errmess);
3340 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3341 "errors_reply_to (%s) does not contain a domain", errors_reply_to);
3344 /* If smtp_accept_queue or smtp_accept_max_per_host is set, then
3345 smtp_accept_max must also be set. */
3347 if (smtp_accept_max == 0 &&
3348 (smtp_accept_queue > 0 || smtp_accept_max_per_host != NULL))
3349 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3350 "smtp_accept_max must be set if smtp_accept_queue or "
3351 "smtp_accept_max_per_host is set");
3353 /* Set up the host number if anything is specified. It is an expanded string
3354 so that it can be computed from the host name, for example. We do this last
3355 so as to ensure that everything else is set up before the expansion. */
3357 if (host_number_string != NULL)
3361 uschar *s = expand_string(host_number_string);
3363 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3364 "failed to expand localhost_number \"%s\": %s",
3365 host_number_string, expand_string_message);
3366 n = Ustrtol(s, &end, 0);
3367 while (isspace(*end)) end++;
3369 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3370 "localhost_number value is not a number: %s", s);
3371 if (n > LOCALHOST_MAX)
3372 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3373 "localhost_number is greater than the maximum allowed value (%d)",
3379 /* If tls_verify_hosts is set, tls_verify_certificates must also be set */
3381 if ((tls_verify_hosts != NULL || tls_try_verify_hosts != NULL) &&
3382 tls_verify_certificates == NULL)
3383 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3384 "tls_%sverify_hosts is set, but tls_verify_certificates is not set",
3385 (tls_verify_hosts != NULL)? "" : "try_");
3387 /* This also checks that the library linkage is working and we can call
3388 routines in it, so call even if tls_require_ciphers is unset */
3389 if (!tls_dropprivs_validate_require_cipher())
3392 /* Magic number: at time of writing, 1024 has been the long-standing value
3393 used by so many clients, and what Exim used to use always, that it makes
3394 sense to just min-clamp this max-clamp at that. */
3395 if (tls_dh_max_bits < 1024)
3396 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3397 "tls_dh_max_bits is too small, must be at least 1024 for interop");
3399 /* If openssl_options is set, validate it */
3400 if (openssl_options != NULL)
3403 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3404 "openssl_options is set but we're using GnuTLS");
3407 if (!(tls_openssl_options_parse(openssl_options, &dummy)))
3408 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3409 "openssl_options parse error: %s", openssl_options);
3413 if (gnutls_require_kx || gnutls_require_mac || gnutls_require_proto)
3414 log_write(0, LOG_MAIN, "WARNING: main options"
3415 " gnutls_require_kx, gnutls_require_mac and gnutls_require_protocols"
3417 #endif /*SUPPORT_TLS*/
3422 /*************************************************
3423 * Initialize one driver *
3424 *************************************************/
3426 /* This is called once the driver's generic options, if any, have been read.
3427 We can now find the driver, set up defaults for the private options, and
3428 unset any "set" bits in the private options table (which might have been
3429 set by another incarnation of the same driver).
3432 d pointer to driver instance block, with generic
3434 drivers_available vector of available drivers
3435 size_of_info size of each block in drivers_available
3436 class class of driver, for error message
3438 Returns: pointer to the driver info block
3441 static driver_info *
3442 init_driver(driver_instance *d, driver_info *drivers_available,
3443 int size_of_info, uschar *class)
3447 for (dd = drivers_available; dd->driver_name[0] != 0;
3448 dd = (driver_info *)(((uschar *)dd) + size_of_info))
3450 if (Ustrcmp(d->driver_name, dd->driver_name) == 0)
3453 int len = dd->options_len;
3455 d->options_block = store_get(len);
3456 memcpy(d->options_block, dd->options_block, len);
3457 for (i = 0; i < *(dd->options_count); i++)
3458 dd->options[i].type &= ~opt_set;
3463 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3464 "%s %s: cannot find %s driver \"%s\"", class, d->name, class, d->driver_name);
3466 return NULL; /* never obeyed */
3472 /*************************************************
3473 * Initialize driver list *
3474 *************************************************/
3476 /* This function is called for routers, transports, and authentication
3477 mechanisms. It reads the data from the current point in the configuration file
3478 up to the end of the section, and sets up a chain of instance blocks according
3479 to the file's contents. The file will already have been opened by a call to
3480 readconf_main, and must be left open for subsequent reading of further data.
3482 Any errors cause a panic crash. Note that the blocks with names driver_info and
3483 driver_instance must map the first portions of all the _info and _instance
3484 blocks for this shared code to work.
3487 class "router", "transport", or "authenticator"
3488 anchor &routers, &transports, &auths
3489 drivers_available available drivers
3490 size_of_info size of each info block
3491 instance_default points to default data for an instance
3492 instance_size size of instance block
3493 driver_optionlist generic option list
3494 driver_optionlist_count count of generic option list
3500 readconf_driver_init(
3502 driver_instance **anchor,
3503 driver_info *drivers_available,
3505 void *instance_default,
3507 optionlist *driver_optionlist,
3508 int driver_optionlist_count)
3510 driver_instance **p = anchor;
3511 driver_instance *d = NULL;
3514 while ((buffer = get_config_line()) != NULL)
3519 /* Read the first name on the line and test for the start of a new driver. A
3520 macro definition indicates the end of the previous driver. If this isn't the
3521 start of a new driver, the line will be re-read. */
3523 s = readconf_readname(name, sizeof(name), buffer);
3525 /* Handle macro definition, first finishing off the initialization of the
3526 previous driver, if any. */
3528 if (isupper(*name) && *s == '=')
3532 if (d->driver_name == NULL)
3533 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3534 "no driver defined for %s \"%s\"", class, d->name);
3538 read_macro_assignment(buffer);
3542 /* If the line starts with a name terminated by a colon, we are at the
3543 start of the definition of a new driver. The rest of the line must be
3550 /* Finish off initializing the previous driver. */
3554 if (d->driver_name == NULL)
3555 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3556 "no driver defined for %s \"%s\"", class, d->name);
3560 /* Check that we haven't already got a driver of this name */
3562 for (d = *anchor; d != NULL; d = d->next)
3563 if (Ustrcmp(name, d->name) == 0)
3564 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3565 "there are two %ss called \"%s\"", class, name);
3567 /* Set up a new driver instance data block on the chain, with
3568 its default values installed. */
3570 d = store_get(instance_size);
3571 memcpy(d, instance_default, instance_size);
3574 d->name = string_copy(name);
3576 /* Clear out the "set" bits in the generic options */
3578 for (i = 0; i < driver_optionlist_count; i++)
3579 driver_optionlist[i].type &= ~opt_set;
3581 /* Check nothing more on this line, then do the next loop iteration. */
3583 while (isspace(*s)) s++;
3584 if (*s != 0) extra_chars_error(s, US"driver name ", name, US"");
3588 /* Not the start of a new driver. Give an error if we have not set up a
3589 current driver yet. */
3591 if (d == NULL) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3592 "%s name missing", class);
3594 /* First look to see if this is a generic option; if it is "driver",
3595 initialize the driver. If is it not a generic option, we can look for a
3596 private option provided that the driver has been previously set up. */
3598 if (readconf_handle_option(buffer, driver_optionlist,
3599 driver_optionlist_count, d, NULL))
3601 if (d->info == NULL && d->driver_name != NULL)
3602 init_driver(d, drivers_available, size_of_info, class);
3605 /* Handle private options - pass the generic block because some may
3606 live therein. A flag with each option indicates if it is in the public
3609 else if (d->info != NULL)
3611 readconf_handle_option(buffer, d->info->options,
3612 *(d->info->options_count), d, US"option \"%s\" unknown");
3615 /* The option is not generic and the driver name has not yet been given. */
3617 else log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "option \"%s\" unknown "
3618 "(\"driver\" must be specified before any private options)", name);
3621 /* Run the initialization function for the final driver. */
3625 if (d->driver_name == NULL)
3626 log_write(0, LOG_PANIC_DIE|LOG_CONFIG,
3627 "no driver defined for %s \"%s\"", class, d->name);
3634 /*************************************************
3635 * Check driver dependency *
3636 *************************************************/
3638 /* This function is passed a driver instance and a string. It checks whether
3639 any of the string options for the driver contains the given string as an
3643 d points to a driver instance block
3644 s the string to search for
3646 Returns: TRUE if a dependency is found
3650 readconf_depends(driver_instance *d, uschar *s)
3652 int count = *(d->info->options_count);
3656 for (ol = d->info->options; ol < d->info->options + count; ol++)
3658 void *options_block;
3660 int type = ol->type & opt_mask;
3661 if (type != opt_stringptr) continue;
3662 options_block = ((ol->type & opt_public) == 0)? d->options_block : (void *)d;
3663 value = *(uschar **)((uschar *)options_block + (long int)(ol->value));
3664 if (value != NULL && (ss = Ustrstr(value, s)) != NULL)
3666 if (ss <= value || (ss[-1] != '$' && ss[-1] != '{') ||
3667 isalnum(ss[Ustrlen(s)])) continue;
3668 DEBUG(D_transport) debug_printf("driver %s: \"%s\" option depends on %s\n",
3669 d->name, ol->name, s);
3674 DEBUG(D_transport) debug_printf("driver %s does not depend on %s\n", d->name, s);
3681 /*************************************************
3682 * Decode an error type for retries *
3683 *************************************************/
3685 /* This function is global because it is also called from the main
3686 program when testing retry information. It decodes strings such as "quota_7d"
3687 into numerical error codes.
3690 pp points to start of text
3691 p points past end of text
3692 basic_errno points to an int to receive the main error number
3693 more_errno points to an int to receive the secondary error data
3695 Returns: NULL if decoded correctly; else points to error text
3699 readconf_retry_error(const uschar *pp, const uschar *p, int *basic_errno, int *more_errno)
3702 const uschar *q = pp;
3703 while (q < p && *q != '_') q++;
3706 if (len == 5 && strncmpic(pp, US"quota", len) == 0)
3708 *basic_errno = ERRNO_EXIMQUOTA;
3709 if (q != p && (*more_errno = readconf_readtime(q+1, *p, FALSE)) < 0)
3710 return US"bad time value";
3713 else if (len == 7 && strncmpic(pp, US"refused", len) == 0)
3715 *basic_errno = ECONNREFUSED;
3718 if (strncmpic(q+1, US"MX", p-q-1) == 0) *more_errno = 'M';
3719 else if (strncmpic(q+1, US"A", p-q-1) == 0) *more_errno = 'A';
3720 else return US"A or MX expected after \"refused\"";
3724 else if (len == 7 && strncmpic(pp, US"timeout", len) == 0)
3726 *basic_errno = ETIMEDOUT;
3730 int xlen = p - q - 1;
3731 const uschar *x = q + 1;
3733 static uschar *extras[] =
3734 { US"A", US"MX", US"connect", US"connect_A", US"connect_MX" };
3735 static int values[] =
3736 { 'A', 'M', RTEF_CTOUT, RTEF_CTOUT|'A', RTEF_CTOUT|'M' };
3738 for (i = 0; i < sizeof(extras)/sizeof(uschar *); i++)
3740 if (strncmpic(x, extras[i], xlen) == 0)
3742 *more_errno = values[i];
3747 if (i >= sizeof(extras)/sizeof(uschar *))
3749 if (strncmpic(x, US"DNS", xlen) == 0)
3751 log_write(0, LOG_MAIN|LOG_PANIC, "\"timeout_dns\" is no longer "
3752 "available in retry rules (it has never worked) - treated as "
3755 else return US"\"A\", \"MX\", or \"connect\" expected after \"timeout\"";
3760 else if (strncmpic(pp, US"mail_4", 6) == 0 ||
3761 strncmpic(pp, US"rcpt_4", 6) == 0 ||
3762 strncmpic(pp, US"data_4", 6) == 0)
3765 int x = 255; /* means "any 4xx code" */
3766 if (p != pp + 8) bad = TRUE; else
3768 int a = pp[6], b = pp[7];
3772 if (isdigit(b)) x += b - '0';
3773 else if (b == 'x') x += 100;
3776 else if (a != 'x' || b != 'x') bad = TRUE;
3780 return string_sprintf("%.4s_4 must be followed by xx, dx, or dd, where "
3781 "x is literal and d is any digit", pp);
3783 *basic_errno = (*pp == 'm')? ERRNO_MAIL4XX :
3784 (*pp == 'r')? ERRNO_RCPT4XX : ERRNO_DATA4XX;
3785 *more_errno = x << 8;
3788 else if (len == 4 && strncmpic(pp, US"auth", len) == 0 &&
3789 strncmpic(q+1, US"failed", p-q-1) == 0)
3790 *basic_errno = ERRNO_AUTHFAIL;
3792 else if (strncmpic(pp, US"lost_connection", p - pp) == 0)
3793 *basic_errno = ERRNO_SMTPCLOSED;
3795 else if (strncmpic(pp, US"tls_required", p - pp) == 0)
3796 *basic_errno = ERRNO_TLSREQUIRED;
3798 else if (len != 1 || Ustrncmp(pp, "*", 1) != 0)
3799 return string_sprintf("unknown or malformed retry error \"%.*s\"", (int) (p-pp), pp);
3807 /*************************************************
3808 * Read retry information *
3809 *************************************************/
3811 /* Each line of retry information contains:
3813 . A domain name pattern or an address pattern;
3815 . An error name, possibly with additional data, or *;
3817 . An optional sequence of retry items, each consisting of an identifying
3818 letter, a cutoff time, and optional parameters.
3820 All this is decoded and placed into a control block. */
3823 /* Subroutine to read an argument, preceded by a comma and terminated
3824 by comma, semicolon, whitespace, or newline. The types are: 0 = time value,
3825 1 = fixed point number (returned *1000).
3828 paddr pointer to pointer to current character; updated
3829 type 0 => read a time; 1 => read a fixed point number
3831 Returns: time in seconds or fixed point number * 1000
3835 retry_arg(const uschar **paddr, int type)
3837 const uschar *p = *paddr;
3840 if (*p++ != ',') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma expected");
3842 while (isspace(*p)) p++;
3844 while (isalnum(*p) || (type == 1 && *p == '.')) p++;
3846 if (*p != 0 && !isspace(*p) && *p != ',' && *p != ';')
3847 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "comma or semicolon expected");
3853 return readconf_readtime(pp, *p, FALSE);
3855 return readconf_readfixed(pp, *p);
3857 return 0; /* Keep picky compilers happy */
3860 /* The function proper */
3863 readconf_retries(void)
3865 retry_config **chain = &retries;
3869 while ((p = get_config_line()) != NULL)
3871 retry_rule **rchain;
3875 next = store_get(sizeof(retry_config));
3878 chain = &(next->next);
3879 next->basic_errno = next->more_errno = 0;
3880 next->senders = NULL;
3882 rchain = &(next->rules);
3884 next->pattern = string_dequote(&p);
3885 while (isspace(*p)) p++;
3887 while (mac_isgraph(*p)) p++;
3888 if (p - pp <= 0) log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3889 "missing error type in retry rule");
3891 /* Test error names for things we understand. */
3893 if ((error = readconf_retry_error(pp, p, &(next->basic_errno),
3894 &(next->more_errno))) != NULL)
3895 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "%s", error);
3897 /* There may be an optional address list of senders to be used as another
3898 constraint on the rule. This was added later, so the syntax is a bit of a
3899 fudge. Anything that is not a retry rule starting "F," or "G," is treated as
3902 while (isspace(*p)) p++;
3903 if (Ustrncmp(p, "senders", 7) == 0)
3906 while (isspace(*p)) p++;
3907 if (*p++ != '=') log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3908 "\"=\" expected after \"senders\" in retry rule");
3909 while (isspace(*p)) p++;
3910 next->senders = string_dequote(&p);
3913 /* Now the retry rules. Keep the maximum timeout encountered. */
3915 while (isspace(*p)) p++;
3919 retry_rule *rule = store_get(sizeof(retry_rule));
3921 rchain = &(rule->next);
3923 rule->rule = toupper(*p++);
3924 rule->timeout = retry_arg(&p, 0);
3925 if (rule->timeout > retry_maximum_timeout)
3926 retry_maximum_timeout = rule->timeout;
3930 case 'F': /* Fixed interval */
3931 rule->p1 = retry_arg(&p, 0);
3934 case 'G': /* Geometrically increasing intervals */
3935 case 'H': /* Ditto, but with randomness */
3936 rule->p1 = retry_arg(&p, 0);
3937 rule->p2 = retry_arg(&p, 1);
3941 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "unknown retry rule letter");
3945 if (rule->timeout <= 0 || rule->p1 <= 0 ||
3946 (rule->rule != 'F' && rule->p2 < 1000))
3947 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
3948 "bad parameters for retry rule");
3950 while (isspace(*p)) p++;
3954 while (isspace(*p)) p++;
3957 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "semicolon expected");
3964 /*************************************************
3965 * Initialize authenticators *
3966 *************************************************/
3968 /* Read the authenticators section of the configuration file.
3977 auth_instance *au, *bu;
3978 readconf_driver_init(US"authenticator",
3979 (driver_instance **)(&auths), /* chain anchor */
3980 (driver_info *)auths_available, /* available drivers */
3981 sizeof(auth_info), /* size of info block */
3982 &auth_defaults, /* default values for generic options */
3983 sizeof(auth_instance), /* size of instance block */
3984 optionlist_auths, /* generic options */
3985 optionlist_auths_size);
3987 for (au = auths; au != NULL; au = au->next)
3989 if (au->public_name == NULL)
3990 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "no public name specified for "
3991 "the %s authenticator", au->name);
3992 for (bu = au->next; bu != NULL; bu = bu->next)
3994 if (strcmpic(au->public_name, bu->public_name) == 0)
3996 if ((au->client && bu->client) || (au->server && bu->server))
3997 log_write(0, LOG_PANIC_DIE|LOG_CONFIG, "two %s authenticators "
3998 "(%s and %s) have the same public name (%s)",
3999 (au->client)? US"client" : US"server", au->name, bu->name,
4009 /*************************************************
4010 * Read ACL information *
4011 *************************************************/
4013 /* If this run of Exim is not doing something that involves receiving a
4014 message, we can just skip over the ACL information. No need to parse it.
4016 First, we have a function for acl_read() to call back to get the next line. We
4017 need to remember the line we passed, because at the end it will contain the
4018 name of the next ACL. */
4020 static uschar *acl_line;
4025 acl_line = get_config_line();
4030 /* Now the main function:
4041 /* Read each ACL and add it into the tree. Macro (re)definitions are allowed
4044 acl_line = get_config_line();
4046 while(acl_line != NULL)
4052 p = readconf_readname(name, sizeof(name), acl_line);
4053 if (isupper(*name) && *p == '=')
4055 read_macro_assignment(acl_line);
4056 acl_line = get_config_line();
4060 if (*p != ':' || name[0] == 0)
4061 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "missing or malformed ACL name");
4063 node = store_get(sizeof(tree_node) + Ustrlen(name));
4064 Ustrcpy(node->name, name);
4065 if (!tree_insertnode(&acl_anchor, node))
4066 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4067 "there are two ACLs called \"%s\"", name);
4069 node->data.ptr = acl_read(acl_callback, &error);
4071 if (node->data.ptr == NULL && error != NULL)
4072 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "error in ACL: %s", error);
4078 /*************************************************
4079 * Read configuration for local_scan() *
4080 *************************************************/
4082 /* This function is called after "begin local_scan" is encountered in the
4083 configuration file. If the local_scan() function allows for configuration
4084 options, we can process them. Otherwise, we expire in a panic.
4091 local_scan_init(void)
4093 #ifndef LOCAL_SCAN_HAS_OPTIONS
4094 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN, "local_scan() options not supported: "
4095 "(LOCAL_SCAN_HAS_OPTIONS not defined in Local/Makefile)");
4099 while ((p = get_config_line()) != NULL)
4101 (void) readconf_handle_option(p, local_scan_options, local_scan_options_count,
4102 NULL, US"local_scan option \"%s\" unknown");
4109 /*************************************************
4110 * Read rest of configuration (after main) *
4111 *************************************************/
4113 /* This function reads the rest of the runtime configuration, after the main
4114 configuration. It is called only when actually needed. Each subsequent section
4115 of the configuration starts with a line of the form
4119 where the name is "routers", "transports", etc. A section is terminated by
4120 hitting the next "begin" line, and the next name is left in next_section.
4121 Because it may confuse people as to whether the names are singular or plural,
4122 we add "s" if it's missing. There is always enough room in next_section for
4123 this. This function is basically just a switch.
4129 static uschar *section_list[] = {
4143 while(next_section[0] != 0)
4147 int last = sizeof(section_list) / sizeof(uschar *);
4149 int n = Ustrlen(next_section);
4151 if (tolower(next_section[n-1]) != 's') Ustrcpy(next_section+n, "s");
4155 int c = strcmpic(next_section, section_list[mid]);
4157 if (c > 0) first = mid + 1; else last = mid;
4159 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4160 "\"%.*s\" is not a known configuration section name", n, next_section);
4161 mid = (last + first)/2;
4165 if (((had ^= bit) & bit) == 0)
4166 log_write(0, LOG_PANIC_DIE|LOG_CONFIG_IN,
4167 "\"%.*s\" section is repeated in the configuration file", n,
4172 case 0: readconf_acl(); break;
4173 case 1: auths_init(); break;
4174 case 2: local_scan_init(); break;
4175 case 3: readconf_retries(); break;
4176 case 4: readconf_rewrites(); break;
4177 case 5: route_init(); break;
4178 case 6: transport_init(); break;
4182 (void)fclose(config_file);
4187 /* End of readconf.c */